HBW Alive provides full accounts for every bird species known to science up to June 2013, including distribution maps and color illustrations. Check out these recently updated species or search the species you want.

Explore the following sample species accounts to better understand the monumental work that lies behind these pages.

Come back often! The sample species are being rotated every month.

Gyrfalcon (Falco rusticolus)


Falco rusticolus

Linnaeus, 1758, Sweden.

Closest to F. cherrug; genetic data indicate that these two, along with F. biarmicus and F. jugger, form a group of closely...

Descriptive notes: 48–60 cm; male 769–1450 g, female 1130–2150 g; wingspan 105–135 cm. The largest Falco, with larger head, deeper chest, relatively short but broad outer wings and longer tail than other large falcons....
figure, drawing, illustration of Gyrfalcon (Falco rusticolus)

Long-tailed Tit (Aegithalos caudatus)


Parus caudatus

Linnaeus, 1758, Sweden.

Often treated as conspecific with A. glaucogularis, but plumage distinctive, and no reports of regular intergradation or hybridization with latter...

Descriptive notes: 13–16 cm, of which tail 6–10 cm; 6·2–10·4 g (europaeus). A tiny, round-bodied passerine with short stubby bill and very long, narrow tail; plumage mainly black and white, with variable amounts of grey and...
figure, drawing, illustration of Long-tailed Tit (Aegithalos caudatus)

Golden-collared Manakin (Manacus vitellinus)


Pipra vitellina

Gould, 1843, Panama City, Panama.

Phylogenetic study#R supports sister relationship between present species and W races of M. manacus....

Descriptive notes: 10–11 cm; male 19·3 g, female 17·1 g. Male nominate race has black cap, golden-yellow on rest of head, upper mantle, shoulders, and chin to breast, throat feathers elongated (projected forwards well beyond bill tip...
figure, drawing, illustration of Golden-collared Manakin (Manacus vitellinus)

Rufous Hummingbird (Selasphorus rufus)


Trochilus rufus

J. F. Gmelin, 1788, Nootka Sound, Vancouver Island, Canada.

Closely related to S. sasin (see below). Monotypic.

Descriptive notes: c. 8·5 cm; 2·9–3·9 g. Male has medium-short, straight black bill; crown bronze or bronze-green, remaining upperparts rufous, occasionally with a few green feathers on the back; throat iridescent scarlet-bronze...
figure, drawing, illustration of Rufous Hummingbird (Selasphorus rufus)

Black-and-chestnut Eagle (Spizaetus isidori)


Falco Isidori

Des Murs, 1845, Bogotá, Colombia.

Previously placed in monotypic genus Oroaetus, but recent phylogenetic study found this species to be nested among the New World Spizaetus...

Descriptive notes: 60–80 cm, wingspan 144–166 cm. Large, stocky eagle with relatively short tail but long wings. Head, crest, neck and upperparts black, below chestnut streaked with black; thighs black, feathered tarsi chestnut; tail...
figure, drawing, illustration of Black-and-chestnut Eagle (Spizaetus isidori)