Similar to Red-eyed Vireo: olive-green above, whitish below, with no wing bars-but lacks bold face pattern, having only a narrow white eyebrow. Can This Critically Endangered Bird Survive Australia's New Climate Reality? Visit your local Audubon center, join a chapter, or help save birds with your state program. Warbling Vireo > Introduction Warbling Vireo. Nestlings are fed and brooded by both parents, leave the nest 12-16 days after hatching. Head is brownish with pale line over eye and dark line through eye. The species is re­ covering from this decline; it has been in­ creasing in numbers at an annual rate of 3.4% in the northeastern U.S. since 1966, according to U.S. Philadelphia vireos overwinter in Central America from southern Mexico through Panama. West of the Great Plains, the range extends south through the higher elevations of the western United States and Mexico to the Isthmus of Tehuantepec. Drab gray bird lacks any distinctive features. The warbling vireo (Vireo gilvus) is a small North American songbird. Photo: Howard Arndt/Audubon Photography Awards, Great Egret. It winters south of the Isthmus of Tehuantepec from south-central Chiapas to Nicaragua. Brownish upperparts with no wingbars. Most species have short, narrow bills and relatively long legs. In breeding season feeds mainly on insects, including many caterpillars, plus aphids, beetles, grasshoppers, ants, bugs, scale insects, flies, dragonflies; also eats some spiders and snails. See more images of this species in Macaulay Library. Warbling Vireo (Photos by Carol Riddell) The Warbling Vireo is one of three migratory vireos that are regular summer residents of Washington. Let us send you the latest in bird and conservation news. Description identification. Habitat in Breeding Range. Our email newsletter shares the latest programs and initiatives. Learn more . It’s a great bird to learn by ear, because its fast, rollicking song is its most distinctive feature. Some of the different feather colors include tan, yellow, blue, green, grey, brown, and more. Avoids unbroken mature forest. The same climate change-driven threats that put birds at risk will affect other wildlife and people, too. Fresh spring birds can be washed yellowish on underparts (usually strongest on sides). Gardali, T. and G. Ballard (2020). Habitat in Nonbreeding Range. They overwinter from western Mexico through the northern part of Central America — a remarkably small territory, considering their breeding range comprises nearly all the Lower 48 and much of western Canada. Although the Warbling Vireo is a widespread and common species in Minnesota, relative breeding densities are much higher in states and regions farther west. Occurrence. Warbling Vireos are often found in willow or cottonwood stands along rivers. Bald Eagle. Nest heights range from 8 to 40 feet and average around 22 feet. Illustration © David Allen Sibley. Gardali, T. 2003. Mostly insects, some berries. They are medium-sized for vireos, with a fairly round head and medium-length bill and tail. Winters in Central America. Vireo gilvus, or warbling vireos, inhabit the Nearctic and Neotropical regions.This species breeds across nearly the entire United States, excluding the southeast region. Habitat: Deciduous and … Even on migration they typically occur in areas with taller trees. Philadelphia vireos measure 13.3 cm in length, have a wingspan of 20.3 cm, and weigh in at only 12 g. Like all vireos, they feature a distinctive slender, hooked beak which in Philadelphia vireos is shorter than most other vireo species. The Warbling Vireo's typical habitat is open deciduous or shrubby mixed woodlands, especially where large trees are present. Plan trips, find birds, track your lists, explore range maps and bird migration—all free. Individuals that breed in the Rocky Mountains and west have darker gray-brown heads and sing a different song than individuals of eastern North America. Warbling Vireo. Enter Bird's Name in Search Box: www.birds-of-north-america.net: Species: The Warbling Vireo (Vireo gilvus) along with the Red-eyed Vireo are the most common vireos seen in North America. This bird prefers boreal, temperate, subtropical, or tropical forest ecosystems as well as inland wetlands such as rivers, streams, creeks, and waterfalls. Search. Warbling Vireo in full-throated song. Predictor Importance for Warbling Vireo (Vireo gilvus) Relative to All Species. It winters south of the Isthmus of Tehuantepec from south-central Chiapas to Nicaragua. The Warbling Vireo is widely but thinly distributed in Vermont. DISTRIBUTION. Black-whiskered vireo. It winters south of the Isthmus of Tehuantepec from south-central Chiapas to Nicaragua. Warbling Vireo Vireo gilvus. Zoom in to see how this species’s current range will shift, expand, and contract under increased global temperatures. It is recognized by its warbling melody, heard from up high, in mostly deciduous trees. One was photographed at Chadron SP’s banding station 3 Sep 2014 (LeFever 2014). The preferred habitats of Warbling Vireos include open woodlands, riparian habitats, shades trees and isolated groves. However their brains are relatively large and their learning abilities are greater than those of most other birds. 5-6" (13-15 cm). A warbling vireo can live to be at least 13 years old. call / song. Warbling Vireos are gray-olive above and whitish below, washed on the sides and vent with yellow. The above range includes all the subspecies of the warbling vireo breeding within the Check-list range of which four are recognized. Warbling Vireo Vireo gilvus Order: Passeriformes Members of this diverse group make up more than half of the bird species worldwide. It is heard more often than seen. In fact, some scientists believe that several of the subspecies are now separate species themselves. Since it favors open woods and edges, probably increased in some areas initially with clearing and breaking up of forest. The two forms meet near the western edge of the Great Plains, and both forms breed in, at least, Colorado. Warbling Vireos are migratory and they have a wide breeding range. Typically, the brightest plumage on Warbling Vireos is on vent or flanks. Breeds mainly in mature deciduous woods, especially along streams and other wetlands. The two forms have similar, but diagnosably different songs, western birds having higher-pitched, less “sing-songy,” less caroling, and slightly longer songs than those of eastern birds. Warbling vireo. Includes range map, photos, and songs and calls. eBird transforms your bird sightings into science and conservation. Otherwise, Warbling Vireos are fairly plain birds with gray-olive upperparts and white underparts washed with faint yellow. Male frequently sings from nest while incubating. Takes berries and small fruit from bunchberry, dogwood, pokeweed, sumac, elderberry, poison-oak, and many other plants, especially in late summer and fall. They eat mostly caterpillars. The Warbling Vireo is widely perceived to have declined in the Northeast during the 1950S and 196os, apparently as a result of the spraying of shade trees with persistent pesticides (Bull 1974). Young: Nestlings are fed and brooded by both parents, leave the nest 12-16 days after hatching. Lives of North American Birds. Recorded in Poulsbo, Kitsap County, WA. Boxplots provide a quick visual of the distribution of the variable importance from the random forest models from all 147 species (black boxplot) and how each species fits into the overall distribution (cyan line). Males sing while on the nest, often located within 12 feet of the ground. Ornithol. This map depicts the range boundary, defined as the areas where the species is estimated to occur at a rate of 5% or more for at least one week within the breeding season. There can be 1 or 2 broods. In some places where it overlaps with the Red-eye, the two species will even defend territories against each other. They have olive-gray backs and wings, with a gray-blue cap. It’s the least you can do. the Vermont range. The rich song of the Warbling Vireo is a common sound in many parts of central and northern North America during summer. Learn more about these drawings. In the West, often found in shrub or tree within 30' of ground. Warbling Vireos occupy forests as well as human dominated landscapes such as parks and suburbs. Most Atlas Project blocks having some open land with groves gilvus'', breeds from central Alberta and northern Montana east and south through most of the United States and parts of southern Canada, outside the range of the previous group. James Watts Jr/Audubon Photography Awards. Authors. These are the Bell's Vireo, Blue-headed Vireo, Cassin's Vireo, Hutton's Vireo, Philadelphia Vireo, Red-eyed Vireo, Warbling Vireo, White-eyed Vireo and the Yellow-throated Vireo. Eyebrow is slightly paler than rest of head and underparts lack patterning. Spread the word. Union 1998, Gardall and Ballard 200). This bird of the treetops is rather uncommon and often overlooked, or passed off as another vireo. Status in Tennessee: The Warbling Vireo is an uncommon summer resident found mostly in the western half and the northeastern corner of the state. The Warbling Vireo has a large range covering much of the Americas and the nearby island nations and territories to which it is native. Forages by moving slowly through small branches, looking around carefully for insects. 5-6" (13-15 cm). We protect birds and the places they need. Listen to Warbling vireo on bird-sounds.net - a comprehensive collection of North American bird songs and bird calls. Plan trips, find birds, track your lists, explore range maps and bird migration—all free. Habitat in Breeding Range. Are the Trump Administration's Environmental Rollbacks Built to Last? Small, chunky songbird with a thicker bill. The eastern warbling vireo, ''V. In courtship, male struts and hops around female with his wings spread and tail fanned, usually not far from potential nest site. Audubon; April 19, 2015 – Status: Common summer resident in deciduous woodlands from the plains to around 10,000 feet. Warbling Vireo Vireo gilvus. 4, sometimes 3-5. Deciduous and mixed woods, aspen groves, poplars, shade trees. WhatBird.com Description, range, habitat, songs and calls, identification tips, and behavior. Photo: James Watts Jr/Audubon Photography Awards. They migrate through Texas and Mexico to reach their winter residence of Central America. The Philadelphia Vireo (Vireo philadelphicus) is also similar, but has yellow tinge to underparts and … This bird prefers boreal, temperate, subtropical, or tropical forest ecosystems as well as inland wetlands such as rivers, streams, creeks, and waterfalls. Generally deciduous tree or shrub. Summary; Text account; Data table and detailed info; Distribution map; Reference and further resources; Select View Summary; Text account ; Data table and detailed info; Distribution map; Reference and further resources; Current view: summary Family: Vireonidae (Vireos and allies) Authority: Vieillot, 1808) Red List Category. The National Audubon Society protects birds and the places they need, today and tomorrow, throughout the Americas using science, advocacy, education, and on-the-ground conservation. The rest have a range mostly in the southern states into Mexico. Vireo philadelphicus are small, stocky vireos that appear very similar to Vireo olivaceus. The Warbling Vireo has a large range covering much of the Americas and the nearby island nations and territories to which it is native. Membership benefits include one year of Audubon magazine and the latest on birds and their habitats. Help power unparalleled conservation work for birds across the Americas, Stay informed on important news about birds and their habitats, Receive reduced or free admission across our network of centers and sanctuaries, Access a free guide of more than 800 species of North American birds, Discover the impacts of climate change on birds and their habitats, Learn more about the birds you love through audio clips, stunning photography, and in-depth text. Warbling Vireo is a complex of two groups of subspecies in eastern and western North America. also picks insects off the undersides of leaves while hovering briefly. Includes photos, illustration with field marks, and range map. Some scientists believe that eastern and western Warbling Vireos may represent two different species; if that is true, then the two are very difficult to tell apart in the wild. Vireo philadelphicus, or Philadelphia vireos, inhabit the Nearctic and Neotropical regions.These birds breed across southern Canada and select northern portions of the United States. Warbling Vireos are often found in willow or cottonwood stands along rivers. Note fairly thick bill and dark line through eye that fades out before it meets the bill. Rather plain, but with a cheery warbled song, the Warbling Vireo is a common summer bird in leafy groves and open woods from coast to coast. They are separated from other vireos by the plain face broken only by a white supercilium, the pale lores, a gray-green back, the lack of wing bars, and the mostly whitish underparts. Warbling Vireo (Image by Garth McElroy/VIREO via Audubon.org. An illustrious birder outlines the highs (and lows) of chasing these songbirds of summer. Warbling Vireos lay 3 to 5 eggs which hatch in about 12 days. Recommended Citation. It looks somewhat like a Warbling Vireo, and its song of short phrases sounds much like that of a Red-eyed Vireo. Between portions of their range, a desert separates the populations. They are not found in large, unbroken tracts of woods, but prefer smaller patches and edges, including logged areas, rural woodlots, and parks. Slightly larger than a Black-capped Chickadee; smaller than a House Finch. Face pattern is fairly low contrast: brownish cap and line through eye with pale eyebrow stripe. The two groups differ in size, genetics, vocalizations and ecology (Am. ... Warbling Vireo (Vireo gilvus), version 1.0. Brownish upperparts lack wingbars; subdued face pattern with brownish line through eye (strongest behind the eye) and pale line over the eye. Nest: In the East, usually placed high in tree, up to 90'. Monotonous warbling song is heard from treetops, particularly in riparian areas and cottonwoods throughout the summer. Most are small. Species: The Warbling Vireo (Vireo gilvus) along with the Red-eyed Vireo are the most common vireos seen in North America. It breeds from coast to coast, though North Carolina lies along the southeastern edge of the range. Get Instant ID help for 650+ North American birds. Status in Tennessee: The Warbling Vireo is an uncommon summer resident found mostly in the western half and the northeastern corner of the state. Habitat in Nonbreeding Range. In fall it is greenish above and whiter below with yellowish sides, flanks, and under tail feathers. Movements and Migration. Favorites. RECOMMENDED CITATION. #1, #2, and #5 show a lot of white below the eye; bird #4 shows very little. It is a small gray-olive bird with white underparts sometimes slightly washed yellow. There are no wing bars, and the underparts are white. adult. As with most other vireos, it winters completely south of the United States. Forages mostly in deciduous trees, sometimes in shrubs, hopping along twigs and searching for insects among the leaves. Warbling Vireo (Vireo gilvus) Photo by James Gallagher, Sea and Sage Audubon Prepared by: Thomas Gardali (tgardali@prbo.org) PRBO Conservation Science 4990 Shoreline Highway, Stinson Beach, CA 94970. A new study finds that quiet fliers are safer than more social species when it comes to avoiding urban hazards on nocturnal migrations. Rather plain, but with a cheery warbled song, the Warbling Vireo is a common summer bird in leafy groves and open woods from coast to coast. The Border Wall Has Been 'Absolutely Devastating' for People and Wildlife, Rulers of the Upper Realm, Thunderbirds Are Powerful Native Spirits. In the West, breeds in broad-leaved trees of mountains, canyons, and prairie groves. Elsewhere in North America Warbling Vireo breeds from southeast Alaska across Canada to Newfoundland, then south through the Appalachian Mountains and the Mississippi River drainage. Winters in the tropics in open woods. In Tennessee, nests are placed more often in sycamore trees than other tree species. The cause of the loss of habitat varies, but includes the clearance of land for livestock as well as overgrazing by livestock and deer. Found nesting in mature broad-leafed and coniferous mixed forests as well as riparian forest in drier areas, this vireo gleans for insects and occasional fruits from mid to high levels in the trees. eBird transforms your bird sightings into science and conservation. Dull in plumage but persistent and musical in song, the Warbling Vireo has a large breeding range across North America. The predicted distribution map for the Warbling Vireo suggests that the core of the species’ breeding range lies within west-central and northwestern Minnesota, from Lac qui Parle and Yellow Medicine Counties north to Kittson and Roseau Counties (Figure 4). Incubation is by both parents, 12-14 days. Kevin Vance. Scientific name: Vireo gilvus. Blue-headed vireo. Audubon’s scientists have used 140 million bird observations and sophisticated climate models to project how climate change will affect this bird’s range in the future. 0:00 / Warbling vireo (call / song) call, song. The Eastern Warbling Vireo, V. gilvus, breeds from central Alberta and northern Montana east and south through most of the United States and parts of southern Canada, outside the range of the previous group. In the East, often in isolated groves near water. The warbling vireo has the largest range of any member of the family in North America, being found from western and southern Canada through most of the United States. All of them measure between four and seven inches long, and weigh less than two ounces. Migrates mostly at night. Passerine birds are divided into two suborders, the suboscines and the oscines. Bell's vireo. The autumn migration of the War­ bling Vireo peaks in August. nw Mexico.) Hutton’s Vireo – This species lives over a relatively wide range. Because it avoids solid tracts of mature, unbroken forest, it is probably more common and widespread today than it was when the Pilgrims landed. – Populations: In Boulder County these sweet-singing vireos nest primarily in cottonwoods on the plains and aspen groves in the foothills. Warbling Vireos occupy forests as well as human dominated landscapes such as parks and suburbs. Or take action immediately with one of our current campaigns below: The Audubon Bird Guide is a free and complete field guide to more than 800 species of North American birds, right in your pocket. It winters south of the Isthmus of Tehuantepec from south-central Chiapas to Nicaragua. The Eastern Warbling Vireo, V. gilvus, breeds from central Alberta and northern Montana east and south through most of the United States and parts of southern Canada, outside the range of the previous group. Western birds also have slightly longer bills, but this difference is only rarely useable in the field. Deciduous forest is the favored habitat of Warbling Vireos throughout the year, though they also use some mixed coniferous and deciduous habitats. A predictive model of Warbling Vireo abundance showed that areas with high canopy (25+m) and upper (8-25m) stratum cover, and low tree basal area explained variation in abundance (Marzluff and Lyon 1983). Dependent young have been reported on five dates in Vermont, ranging from june 26 to july 26. Audubon protects birds and the places they need, today and tomorrow. The warbling vireo is a drab little bird with a colorful, brilliant song. In Birds of the World (A. F. Poole and F. B. Gill, Editors). Other vireos. Now common and widespread. The Warbling Vireo is highly noted for its persistent singing - even from the nest. White with brown or black specks. Audubon; April 19, 2015 – Status: Common summer resident in deciduous woodlands from the plains to around 10,000 feet. Individuals usually arrive by mid-April and depart by mid-September. Photo: Dick Dickinson/Audubon Photography Awards, Adult. Breeds in open deciduous or mixed woodland; also in orchards, shade trees of towns. Nest (built by both sexes) is a compact, deep cup, suspended by its rim from a forked twig. Four Decades of Building Strike Records Point to ‘Super Collider’ Birds. Length 12 to 13 cm, body mass 10 to 16 g. Face with moderately distinct white supercilium contrasting indistinctly with grayish eye-line, but otherwise very plain, without additional contrasting markings. I left for the West Desert later than normal feeling like I was under pressure because I had to be back home and in front of my computer by noon to resolve an ongoing issue. Geographic Range. The Cornell Lab will send you updates about birds, birding, and opportunities to help bird conservation. The Warbling Vireo's typical habitat is open deciduous or shrubby mixed woodlands, especially where large trees are present. Because of this, researchers divide this species into at least 12 different subspecies. Warbling Vireo > Introduction Warbling Vireo. Overwhelmed and Understaffed, Our National Wildlife Refuges Need Help. Western is often cited as having a darker crown and more defined eyeline, giving it less of the “blank-eyed” look associated with Warbling Vireo. Eyeline usually fades out just before it meets the bill. National Audubon Society Timing and Routes of Migration. Adult upperparts are gray with a white eyebrow and indistinct gray eye line. It is a small gray-olive bird with white underparts sometimes slightly washed yellow. Documented fall migration reports of “Western” Warbling Vireo are few and limited to the Panhandle. Male defends territory by singing. Range: Breeding. Your support helps secure a future for birds at risk. The Warbling Vireo has a large range covering much of the Americas and the nearby island nations and territories to which it is native. The lores (the area between the eye and bill) are white in most individuals. You can find them in the summers breeding in Western Canada and most of the United States, except for the Southeast. The Warbling Vireo, along with the Red-eyed Vireo, has the most extensive breeding range of any vireo in North America. Nest heights range from 8 to 40 feet and average around 22 feet. Cornell Lab of Ornithology, Ithaca, NY, USA. – Populations: In Boulder County these sweet-singing vireos nest primarily in cottonwoods on the plains and aspen groves in the foothills. Elevations of breeding habitats range from sea level to 3,200 m (10,500 ft). This bird prefers boreal, temperate, subtropical, or tropical forest ecosystems as well as inland wetlands such as rivers, streams, creeks, and waterfalls. They have a dark line through the eye and a white line over the eye. Warbling Vireos forage sluggishly, intently peering at leaf surfaces from a single perch before pouncing or moving on. Most eastern breeders apparently travel north and south via Texas and Mexico, rather than flying across Gulf of Mexico. Length 12 to 13 cm, body mass 10 to 16 g. Similar to Red-eyed Vireo: olive-green above, whitish below, with no wing bars-but lacks bold face pattern, having only a narrow white eyebrow. The Warbling Vireo has a large range covering much of the Americas and the nearby island nations and territories to which it is native. The eastern warbling vireo, V. gilvus, breeds from central Alberta and northern Montana east and south through most of the United States and parts of southern Canada, outside the range of the previous group. Vireo gilvus gilvus (sc and se Canada, c, s and ne USA) Vireo gilvus swainsoni (w Canada and w USA) Vireo gilvus brewsteri (Rocky Mts.. wc USA. Worn midsummer birds can be nearly entirely gray above and whitish below. Warbling Vireo. Choose a temperature scenario below to see which threats will affect this species as warming increases. Vireos, Shrike-Babblers, and Erpornis(Order: Passeriformes, Family:Vireonidae). Thomas Gardali and Grant Ballard. Home. Otherwise, Warbling Vireos are fairly plain birds with gray-olive upperparts and white underparts washed with faint yellow. There is no black line above the eyebrow. Text © Kenn Kaufman, adapted from There is an endangered vireo, the black-capped vireo, a bird with a limited breeding range in Texas. These small birds vary in plumage and shape, but they are all quite small. Sparrow-sized. Black-capped vireo. Five of seven birds netted at Oliver Reservoir, Kimball Co 31 Aug 2000 were clearly brewsteri, and two netted there 21 Aug 2001 were also brewsteri (Stephen J. Dinsmore, personal communication). The plumage of the two forms is extremely similar. Movements and … Because it avoids solid tracts of mature, unbroken forest, it is probably more common and widespread today than it was when the Pilgrims landed. These groups may represent at least two distinct species. Vireo gilvus Information, images and range maps on over 1,000 birds of North America, including sub-species, vagrants, introduced birds and possibilities . Migration Overview. Geographic Range. Geographic range. Warbling Vireo (Vireo gilvus) is a species of bird in the Vireonidae family. Warbling Vireo and fall colors – Nikon D500, f8, 1/250, ISO 640, +1.0 EV, Nikkor 500mm VR with 1.4x TC, natural light Yesterday was a little messed up for me but I still did alright. Migratory Behavior. Nest made of bark strips, grass, leaves, and plant fibers. They are not found in large, unbroken tracts of woods, but prefer smaller patches and edges, including logged areas, rural woodlots, and parks. Black-capped vireos numbers have dwindled to perilous levels due to the loss of low growing woody cover these birds need for breeding purposes. Warbling Vireos consume spiders, insects and some berries. Western birds tend to be a bit drabber than eastern birds, though plumage color varies more with season than from east to west. Scientific name: Vireo gilvus. They give their loud, rollicking, finch-like song frequently on summer territories. This bird prefers boreal, temperate, subtropical, or tropical forest ecosystems as well as inland wetlands such as rivers, streams, creeks, and waterfalls. Description . It winters south of the Isthmus of Tehuantepec from south-central Chiapas to Nicaragua. Warbling Vireo Vireo gilvus Range map: Breeding Data provided by eBird. to w Mexico) Vireo gilvus victoriae (s Baja California. Small pockets of relatively high breeding densities are found scattered throughout the Tallgrass Aspen Parklands Province. Commonly parasitized by cowbirds. Warbling Vireo range map by Nathan Pieplow. Legal Notices Privacy Policy Contact Us. The rich song of the Warbling Vireo is a common sound in many parts of central and northern North America during summer. In Tennessee, nests are placed more often in sycamore trees than other tree species. The breeding range reaches north to include the southwest Canadian provinces of British Columbia, Alberta, Saskatchewan, and the southwest corner of Manitoba. This is one reason I am skeptical of Warbling Vireo nests in deciduous woodlands throughout Most Warbling Vireos lack yellow on the throat but, when it On Philadelphia Vireo, the Tennessee Warblers are daintier, move more quickly, and have thinner, sharper bills than Warbling Vireos. It’s a great bird to learn by ear, because its fast, rollicking song is its most distinctive feature. In British Columbia, where the species reaches its highest breeding densities, observers report an average of nearly 24 birds per BBS route conducted in the province. The Eastern Warbling Vireo, V. gilvus, breeds from central Alberta and northern Montana east and south through most of the United States and parts of southern Canada, outside the range of the previous group. The Warbling Vireo is highly noted for its persistent singing - even from the nest. Identification tips for the Warbling Vireo: Songs and calls of the Warbling Vireo : Range Map: Breeding Map : Warbling Vireo at Nest Although still common in many areas, the Warbling Vireo has decreased considerably because of extensive spraying of pesticides on shade trees. A - Z. App. Type in your search and hit Enter on desktop or hit Go on mobile device. Its nest is a deep cup made of bark strips, grass and leaves and suspended in the fork of a high branch. Dull in plumage but persistent and musical in song, the Warbling Vireo has a large breeding range across North America. Subspecific information 5 subspecies. Title Warbling Vireo Range - CWHR B418 [ds1625] Publication date 2016-02-0100:00:00 Presentation formats digital map FGDC geospatial presentation format vector digital data Other citation details These are the same layers as appear in the CWHR System software. Warbling Vireos are small, chunky songbirds with thick, straight, slightly hooked bills. Sparrow-sized. Range: Warbling Vireos are medium to long-distant migrants, who mainly travel at night. Warbling Vireo (Vireo gilvus). Small songbird with a thicker bill and a slow, deliberate foraging style. range from late Mayto late june (Bull 1974). Thomas Gardali and Grant Ballard Version: 1.0 — Published March 4, 2020 Text last updated January 1, 2000 The typical race, the eastern warbling vireo (V. g. gilvu8), breeds west to eastern Saskatchewan and the eastern edge of the Great Plains and northern Texas.