Denver-Boulder Metro Area: Birds

The mandarin duck (Aix galericulata) is a perching duck species found in East Asia. It is medium-sized, at 41–49 cm (16–19 in) long with a 65–75 cm (26–30 in) wingspan. It is closely related to the North American wood duck, the only other member of the genus Aix. Aix is an Ancient Greek word which was used by Aristotle to refer to an unknown diving bird, and galericulata is the Latin for a wig, derived from galerum, a cap or... less ↑

The Muscovy duck (Cairina moschata) is a large duck native to Mexico, Central, and South America. Small wild and feral breeding populations have established themselves in the United States, particularly in Florida and the lower Rio Grande Valley of Texas as well as in many other parts of North America, including southern Canada. Feral Muscovy ducks are found in New Zealand, Australia, and in parts of Europe. less ↑

The long-tailed duck (Clangula hyemalis), once known in North America as oldsquaw, is a medium-sized sea duck. It is the only living member of its genus, Clangula. This was formerly used for the goldeneyes, with the long-tailed duck being placed in Harelda, but the latter is the type species of the genus. An undescribed congener is known from the Middle Miocene Sajóvölgyi Formation (Late Badenian, 13–12 Mya) of Mátraszőlős, Hungary. less ↑

The Osprey (Pandion haliaetus), sometimes known as the sea hawk, fish eagle, or fish hawk, is a diurnal, fish-eating bird of prey. It is a large raptor, reaching more than 60 cm (24 in) in length and 180 cm (71 in) across the wings. It is brown on the upperparts and predominantly greyish on the head and underparts. In 1994, the osprey was declared the provincial bird of Nova Scotia, Canada. less ↑

The Golden Eagle (Aquila chrysaetos) is one of the best-known birds of prey in the Northern Hemisphere. It is the most widely distributed species of eagle. Like all eagles, it belongs to the family Accipitridae. These birds are dark brown, with lighter golden-brown plumage on their napes. Immature eagles of this species typically have white on the tail and often have white markings on the wings. Golden Eagles use their agility and speed combined with extremely... less ↑

The sharp-shinned hawk (Accipiter striatus) is a small hawk described from Hispaniola, with males being the smallest hawks in the United States and Canada, but with the species averaging larger than some Neotropical species, such as tiny hawk. The taxonomy is far from resolved, with some authorities considering the southern taxa to represent three separate species: white-breasted hawk (A. chionogaster), plain-breasted hawk (A. ventralis), and rufous-thighed hawk (A. erythronemius). less ↑

The Red-tailed Hawk (Buteo jamaicensis) is a bird of prey, one of three species colloquially known in the United States as the "chickenhawk," though it rarely preys on standard sized chickens. It breeds throughout most of North America, from western Alaska and northern Canada to as far south as Panama and the West Indies, and is one of the most common buteos in North America. Red-tailed Hawks can acclimate to all the biomes within their range.... less ↑

The red-shouldered hawk (Buteo lineatus) is a medium-sized hawk. Its breeding range spans eastern North America and along the coast of California and northern to northeastern-central Mexico. Red-shouldered hawks are permanent residents throughout most of their range, though northern birds do migrate, mostly to central Mexico. The main conservation threat to the widespread species is deforestation. less ↑

The Broad-winged Hawk (Buteo platypterus) is a small hawk of the genus Buteo. During the summer some subspecies are distributed over eastern North America, as far west as British Columbia and Texas; they then migrate south to winter in the neotropics from Mexico down to southern Brazil. Other subspecies are all-year residents on Caribbean islands. As in most raptors, females are slightly larger than males. Broad-winged Hawks' wings are relatively short and broad with a tapered,... less ↑

The Ferruginous Hawk (ferruginous = from Latin ferrum – iron, ferrgin-, iron rust, iron-rust color – reddish-brown), Buteo regalis (Latin, royal hawk), is a large bird of prey and belongs to the broad-winged buteo hawks. An old colloquial name is "Ferrugineous Rough-leg", due to its similarity to the closely related Rough-legged Hawk (B. lagopus). less ↑

Swainson's Hawk (Buteo swainsoni), is a large Buteo hawk of the Falconiformes, sometimes separated in the Accipitriformes like its relatives. This species was named after William Swainson, a British naturalist. It is colloquially known as the Grasshopper Hawk or Locust Hawk, as it is very fond of Acrididae (locusts and grasshoppers) and will voraciously eat these insects whenever they are available. less ↑

The Bald Eagle (Haliaeetus leucocephalus; hali = sea, aeetus = eagle, leuco = white, cephalis = head) is a bird of prey found in North America. A sea eagle, it has two known sub-species and forms a species pair with the White-tailed Eagle (Haliaeetus albicilla). Its range includes most of Canada and Alaska, all of the contiguous United States, and northern Mexico. It is found near large bodies of open water with an abundant food supply... less ↑

The Mississippi Kite (Ictinia mississippiensis) is a small bird of prey in the family Accipitridae. It is 12 to 15 inches (30–37 cm) beak to tail and has a wingspan averaging 3 feet (91 cm). Weight is from 214 to 388 grams (7.6-13.7 oz). Adults are gray with darker gray on their tail feathers and outer wings and lighter gray on their heads and inner wings. Males and females look alike, but the males are slightly paler on the head and... less ↑

The Double-crested Cormorant (Phalacrocorax auritus) is a member of the cormorant family of seabirds. It occurs along inland waterways as well as in coastal areas, and is widely distributed across North America, from the Aleutian Islands in Alaska down to Florida and Mexico. Measuring 70–90 cm (28–35 in) in length, it is an all-black bird which gains a small double crest of black and white feathers in breeding season. It has a bare patch of orange-yellow facial skin.... less ↑

The magnificent frigatebird (Fregata magnificens) is a seabird of the frigatebird family Fregatidae. With a length of 89–114 centimetres (35–45 in) and wingspan of 2.17–2.44 m (7.1–8.0 ft) it is the largest species of frigatebird. It occurs over tropical and subtropical waters off America, between northern Mexico and Ecuador on the Pacific coast and between Florida and southern Brazil along the Atlantic coast. There are also populations on the Galápagos Islands in the Pacific and th less ↑

The barn swallow (Hirundo rustica) is the most widespread species of swallow in the world. It is a distinctive passerine bird with blue upperparts, a long, deeply forked tail and curved, pointed wings. It is found in Europe, Asia, Africa and the Americas. In Anglophone Europe it is just called the swallow; in Northern Europe it is the only common species called a "swallow" rather than a "martin". less ↑

The sand martin (Riparia riparia) or European sand martin, bank swallow in the Americas, and collared sand martin in South Asia, is a migratory passerine bird in the swallow family. It has a wide range in summer, embracing practically the whole of Europe and the Mediterranean countries, part of northern Asia and also North America. It winters in eastern and southern Africa, South America and South Asia. less ↑

The Baltimore Oriole (Icterus galbula) is a small icterid blackbird that commonly occurs in eastern North America as a migratory breeding bird. This bird received its name from the fact that the male's colors resemble those on the coat-of-arms of Lord Baltimore. Like all icterids called "orioles", it is named after an unrelated, physically similar family found in the Old World: the Oriolidae. At one time, this species and the Bullock's Oriole, Icterus bullockii, were considered... less ↑

The western meadowlark (Sturnella neglecta) is a medium-sized icterid bird, about 8.5 in (22 cm) in length. It nests on the ground in open grasslands across western and central North America. It feeds mostly on insects, but will also feed on seeds and berries. The western meadowlark has distinctive calls described as watery or flute-like, which distinguish it from the closely related eastern meadowlark. less ↑

The great-tailed grackle or Mexican grackle (Quiscalus mexicanus) is a medium-sized, highly social passerine bird native to North and South America. A member of the family Icteridae, it is one of ten extant species of grackle and is closely related to the boat-tailed grackle and the slender-billed grackle. It is sometimes erroneously referred to as a "blackbird" in the southern United States, although blackbirds belong to the genus Euphagus. Similarly, it is often called "cuervo" in... less ↑

The Red-winged Blackbird (Agelaius phoeniceus) is a passerine bird of the family Icteridae found in most of North and much of Central America. It breeds from Alaska and Newfoundland south to Florida, the Gulf of Mexico, Mexico, and Guatemala, with isolated populations in western El Salvador, northwestern Honduras, and northwestern Costa Rica. It may winter as far north as Pennsylvania and British Columbia, but northern populations are generally migratory, moving south to Mexico and the southern... less ↑

The loggerhead shrike (Lanius ludovicianus) is a passerine bird. It is the only member of the shrike family endemic to North America; the related northern shrike (L. excubitor) occurs north of its range but also in the Palearctic. It is nicknamed the butcherbird after its carnivorous tendencies, as it consumes prey such as amphibians, insects, lizards, small mammals and small birds. Due to its small size and weak talons, this predatory bird relies on impaling its... less ↑

The black-capped chickadee (Poecile atricapillus) is a small, nonmigratory, North American songbird that lives in deciduous and mixed forests. It is a passerine bird in the tit family Paridae. It is the state bird of both Maine and Massachusetts in the United States, and the provincial bird of New Brunswick in Canada. It is well known for its capacity to lower its body temperature during cold winter nights as well as its good spatial memory to... less ↑

The Mountain Chickadee (Poecile gambeli) is a small songbird, a passerine bird in the tit family Paridae. Often, it is still placed in the genus Parus with most other tits, but mtDNA cytochrome b sequence data and morphology suggest that separating Poecile more adequately expresses these birds' relationships (Gill et al., 2005). The American Ornithologists' Union has been treating Poecile as a distinct genus for some time. less ↑

The house sparrow (Passer domesticus) is a bird of the sparrow family Passeridae, found in most parts of the world. A small bird, it has a typical length of 16 cm (6.3 in) and a weight of 24–39.5 g (0.85–1.39 oz). Females and young birds are coloured pale brown and grey, and males have brighter black, white, and brown markings. One of about 25 species in the genus Passer, the house sparrow is native to most of Europe, the Mediterranean region,... less ↑

The red-breasted nuthatch (Sitta canadensis) is a small songbird. The adult has blue-grey upperparts with cinnamon underparts, a white throat and face with a black stripe through the eyes, a straight grey bill and a black crown. Its call, which has been likened to a tin trumpet, is high-pitched and nasal. It breeds in coniferous forests across Canada, Alaska and the northeastern and western United States. Though often a permanent resident, it regularly irrupts further south... less ↑

The White-breasted Nuthatch (Sitta carolinensis) is a small songbird of the nuthatch family which breeds in old-growth woodland across much of temperate North America. It is a stocky bird, with a large head, short tail, powerful bill and strong feet. The upperparts are pale blue-gray, and the face and underparts are white. It has a black cap and a chestnut lower belly. The nine subspecies differ mainly in the color of the body plumage. less ↑

The Pygmy Nuthatch (Sitta pygmaea) is a tiny songbird, about 10 cm (4 inches) long and about 10 grams in weight. It ranges from southern British Columbia south through various discontinuous parts of the western U.S. (northwest U.S., Sierra Nevada range, southern Rockies, etc.), to central Mexico. It is usually found in pines (especially Ponderosa Pines), Douglas-firs, and other conifers. Pygmy Nuthatches clamber acrobatically in the foliage of these trees, feeding on insects and seeds; less often they creep... less ↑

The common starling (Sturnus vulgaris), also known as the European starling, or in the British Isles just the starling, is a medium-sized passerine bird in the starling family, Sturnidae. It is about 20 cm (8 in) long and has glossy black plumage with a metallic sheen, which is speckled with white at some times of year. The legs are pink and the bill is black in winter and yellow in summer; young birds have browner plumage than the... less ↑

The Canyon Wren (Catherpes mexicanus) is a small North American songbird of the wren family Troglodytidae. It is resident throughout its range and is generally found in arid, rocky cliffs, outcrops and canyons. It is a small bird that is hard to see on its rocky habitat; however, it can be heard throughout the canyons by its distinctive loud and beautiful song. It is currently in a monotypic taxon and is the only species in the... less ↑

The Carolina Wren (Thryothorus ludovicianus) is a common species of wren, resident in the eastern half of the USA, the extreme south of Ontario, Canada, and the extreme northeast of Mexico. A distinct population in the Yucatan Peninsula of Mexico, Belize and extreme north of Guatemala is treated either as a subspecies Thryothorus ludovicianus albinucha, or as a separate species, White-browed Wren (Thryothorus albinucha) . Following a 2006 review, these are the only wrens remaining in... less ↑

The House Wren (Troglodytes aedon) is a very small songbird of the wren family, Troglodytidae. It occurs from Canada to southernmost South America, and is thus the most widely distributed bird in the Americas. It occurs in most suburban areas in its range and it is the single most common wren. Its taxonomy is highly complex and some subspecies groups are often considered separate species. less ↑

The Bewick's wren (Thryomanes bewickii) is a wren native to North America. At about 14 cm (5.5 in) long, it is grey-brown above, white below, with a long white eyebrow. While similar in appearance to the Carolina wren, it has a long tail that is tipped in white. The song is loud and melodious, much like the song of other wrens. The song is broken into two or three individual parts; one individual male may exhibit up to... less ↑

The American robin (Turdus migratorius) is a migratory songbird of the thrush family. It is named after the European robin because of its reddish-orange breast, though the two species are not closely related, with the European robin belonging to the Old World flycatcher family. The American robin is widely distributed throughout North America, wintering from southern Canada to central Mexico and along the Pacific Coast. It is the state bird of Connecticut, Michigan, and Wisconsin. According... less ↑

The veery (Catharus fuscescens) is a small North American thrush species, a member of a group of closely related and similar species in the genus Catharus, also including the gray-cheeked thrush (C. minimus), Bicknell's thrush (C. bicknelli), Swainson's thrush (C. ustulatus), and Hermit thrush (C. guttatus). Alternate names for this species include Wilson's thrush (named so after Alexander Wilson) and tawny thrush. Up to six subspecies exist, which are grouped into the eastern Veery (C. fuscescens... less ↑

The Grey-cheeked Thrush (Catharus minimus) is a medium-sized thrush. This species is 15–17 cm in length, and has the white-dark-white underwing pattern characteristic of Catharus thrushes. It is a member of a close-knit group of migrant species together with the Veery and Bicknell's Thrush; it forms a cryptic species pair with the latter. The Grey-cheeked Thrush is all but indistinguishable from Bicknell's Thrush except by its slightly larger size and different song. The two were formerly considered... less ↑

The Mountain Bluebird (Sialia currucoides) is a medium-sized bird weighing about 30 g (1.1 oz) with a length from 16–20 cm (6.3–7.9 in). They have light underbellies and black eyes. Adult males have thin bills that are bright turquoise-blue and somewhat lighter beneath. Adult females have duller blue wings and tail, grey breast, grey crown, throat and back. In fresh fall plumage, the female's throat and breast are tinged with red-orange; brownish near the flank contrasting with white tail underparts.... less ↑

The western bluebird (Sialia mexicana) is a small thrush, about 15 to 18 cm (5.9 to 7.1 in) in length. Adult males are bright blue on top and on the throat with an orange breast and sides, a brownish patch on back, and a gray belly and undertail coverts. Adult females have a duller blue body, wings, and tail than the male, a gray throat, a dull orange breast, and a gray belly and undertail coverts. Immature western... less ↑

The blue-headed vireo (Vireo solitarius) is a Neotropical migrating song bird found in North and Central America. There are currently two recognized sub-species that belong to the blue-headed vireo. It has a range that extends across Canada and the eastern coast of the United-States, Mexico and some of Central America. It prefers large temperate forests with a mix of evergreen trees and deciduous under growth. less ↑

The Ruby-crowned Kinglet (Regulus calendula) is a very small passerine bird found throughout North America. It is a member of the kinglet family. The bird has olive-green plumage with two white wing bars and a white eye-ring. Males have a red crown patch, which is usually concealed. The sexes are identical (apart from the crown), and juveniles are similar in plumage to adults. It is one of the smallest songbirds in North America. The Ruby-crowned Kinglet... less ↑

The snow bunting (Plectrophenax nivalis), sometimes colloquially called a snowflake, is a passerine bird in the longspur family Calcariidae. It is an arctic specialist, with a circumpolar Arctic breeding range throughout the northern hemisphere. There are small isolated populations on a few high mountain tops south of the Arctic region, including the Cairngorms in central Scotland and the Saint Elias Mountains on the southern Alaska-Yukon border, and also Cape Breton Highlands. less ↑