List of birds of Guam

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This is a list of the bird species recorded in Guam. The avifauna of Guam includes a total of 95 species, of which 2 are endemic, 2 have been introduced by humans, and 1 is rare or accidental. 4 species listed are extirpated in Guam and are not included in the species count. 6 species are globally threatened.

This list's taxonomic treatment (designation and sequence of orders, families, and species) and nomenclature (common and scientific names) follow the conventions of Clements's 5th edition. The family accounts at the beginning of each heading reflects this taxonomy, as do the species counts found in each family account. Introduced and accidental species are included in the total counts for Guam.

The following tags have been used to highlight certain relevant categories. It must be noted that not all species fall into one of these categories. Those that do not are commonly occurring, native species.

  • (A) Accidental A species that rarely or accidentally occurs in Guam.
  • (*) Endemic A species either entirely confined to the Hawiian Islands in its natural distribution, or a species whose breeding range is entirely confined to the Hawaiian Islands.
  • (E) Extinct A recent member of the avifauna that no longer exists.
  • (EW) Extinct in the Wild These species only exist in captive breeding progams, with no documentaion of wild birds found in native habitats.
  • (I) Introduced A species introduced to Guam as a consequence, direct or indirect, of human actions.
  • (Ex) Extirpated A species that no longer occurs in Guam although populations exist elsewhere.


Table of contents

Non-passerines: Shearwaters and Petrels . Storm-Petrels . Tropicbirds . Boobies and Gannets . Frigatebirds . Bitterns, Herons and Egrets . Ducks, Geese and Swans . Osprey . Hawks, Kites and Eagles . Caracaras and Falcons . Megapodes . Pheasants and Partridges . Rails, Crakes, Gallinules, and Coots . Oystercatchers . Plovers and Lapwings . Sandpipers and allies . Gulls . Terns . Pigeons and Doves . Typical owls . Swifts . Kingfishers .

Passerines: Swallows and Martins . Wagtails and Pipits . Old World warblers . Fantails . Monarch flycatchers . White-eyes . Honeyeaters . Drongos . Crows, Jays, Ravens and Magpies . Starlings . Sparrows .

See also       References

[edit] Shearwaters and Petrels

Order: Procellariiformes Family: Procellariidae

The procellariids are the main group of medium-sized 'true petrels', characterised by united nostrils with a medium septum, and a long outer functional primary. There are 75 species worldwide and 4 species which occur in Guam.

[edit] Storm-Petrels

Order: Procellariiformes Family: Hydrobatidae

The storm-petrels are relatives of the petrels, and are the smallest of sea-birds. They feed on planktonic crustaceans and small fish picked from the surface, typically while hovering. The flight is fluttering and sometimes bat-like. There are 21 species worldwide and 2 species which occur in Guam.

[edit] Tropicbirds

Order: Pelecaniformes Family: Phaethontidae

Tropicbirds are slender white birds of tropical oceans, with exceptionally long central tail feathers. Their heads and long wings have black markings. There are 3 species worldwide and 1 species which occurs in Guam.

[edit] Boobies and Gannets

Order: Pelecaniformes Family: Sulidae

The sulids comprise the gannets and boobies. Both groups comprise medium-to-large coastal sea-birds that plunge-dive for fish. There are 9 species worldwide and 3 species which occur in Guam.

[edit] Frigatebirds

Order: Pelecaniformes Family: Fregatidae

Frigatebirds are large sea-birds usually found over tropical oceans. They are large, black and white or completely black, with long wings and deeply-forked tails. The males have inflatable coloured throat pouches. They do not swim or walk, and cannot take off from a flat surface. Having the largest wingspan to body weight ratio of any bird, they are essentially aerial, able to stay aloft for more than a week. There are 5 species worldwide and 2 species which occur in Guam.

[edit] Bitterns, Herons and Egrets

Order: Ciconiiformes Family: Ardeidae

The family Ardeidae contains the bitterns, herons and egrets. Herons and egrets are medium to large sized wading birds with long necks and legs. Bitterns tend to be shorter necked and more wary. Unlike other long-necked birds suck as storks, ibises and spoonbills, members of Ardeidae fly with their necks retracted. There are 61 species worldwide and 5 species which occur in Guam.

[edit] Ducks, Geese and Swans

Order: Anseriformes Family: Anatidae

The family Anatidae includes the ducks and most duck-like waterfowl, such as geese and swans. These are birds that are modified for an aquatic existence with webbed feet, flattened bills and feathers that are excellent at shedding water due to an oily coating. There are 131 species worldwide and 8 species which occur in Guam.

[edit] Osprey

Order: Falconiformes Family: Pandionidae

The Pandionidae family contains only one species, the Osprey. The Osprey is a medium large raptor which is a specialist fish-eater with a worldwide distribution.

[edit] Hawks, Kites and Eagles

Order: Falconiformes Family: Accipitridae

Accipitridae is a family of birds of prey and include hawks, eagles, kites, harriers and Old World vultures. These birds have powerful hooked beaks for tearing flesh from their prey, strong legs, powerful talons, and keen eyesight. There are 233 species worldwide and 2 species which occur in Guam.

[edit] Caracaras and Falcons

Order: Falconiformes Family: Falconidae

Falconidae is a family of diurnal birds of prey. They differ from hawks, eagles, and kites in that they kill with their beaks instead of their feet. There are 62 species worldwide and 1 species which occurs in Guam.

[edit] Megapodes

Order: Galliformes Family: Megapodiidae

The Megapodiidae are stocky, medium-large chicken-like birds with small heads and large feet. All but the Malleefowl occupy jungle habitats, and most have brown or black colouring. There are 21 species worldwide and 1 species which occurs in Guam.

[edit] Pheasants and Partridges

Order: Galliformes Family: Phasianidae

The Phasianidae are a family of terrestrial birds which consists of quails, partridges, snowcocks, francolins, spurfowls, tragopans, monals, pheasants, peafowls and jungle fowls. In general, they are plump (although they may vary in size) and have broad, relatively short wings. There are 156 species worldwide and 2 species which occur in Guam.

[edit] Rails, Crakes, Gallinules, and Coots

Order: Gruiformes Family: Rallidae

Rallidae is a large family of small to medium-sized birds which includes the rails, crakes, coots, and gallinules. Typically they inhabit dense vegetation in damp environments near lakes, swamps, or rivers. In general they are shy and secretive birds, difficult to observe. Most species have strong legs, and have long toes which are well adapted to soft, uneven surfaces. They tend to have short, rounded wings and be weak fliers. There are 143 species worldwide and 4 species which occur in Guam.

[edit] Oystercatchers

Order: Charadriiformes Family: Haematopodidae

The oystercatchers are large and noisy plover-like birds, with strong bills used for smashing or prising open molluscs. There are 11 species worldwide and 1 species which occurs in Guam.

[edit] Plovers and Lapwings

Order: Charadriiformes Family: Charadriidae

The family Charadriidae includes the plovers, dotterels, and lapwings. They are small to medium-sized birds with compact bodies, short, thick necks and long, usually pointed, wings. They are found in open country worldwide, mostly in habitats near water, although there are some exceptions. There are 66 species worldwide and 6 species which occur in Guam.

[edit] Sandpipers and allies

Order: Charadriiformes Family: Scolopacidae

The Scolopacidae are a large diverse family of small to medium sized shorebirds including the sandpipers, curlews, godwits, shanks, tattlers, woodcocks, snipes, dowitchers and phalaropes. The majority of species eat small invertebrates picked out of the mud or soil. Variation in length of legs and bills enable different species to feed in the same habitat, particularly on the coast, without direct competition for food. There are 89 species worldwide and 23 species which occur in Guam.

[edit] Gulls

Order: Charadriiformes Family: Laridae

Laridae is a family of medium to large birds seabirds and includes gulls and kittiwakes. They are typically grey or white, often with black markings on the head or wings. They have stout, longish bills and webbed feet. There are 55 species worldwide and 1 species which occurs in Guam.

[edit] Terns

Order: Charadriiformes Family: Sternidae

Terns are a group of generally general medium to large sea-birds typically with grey or white plumage, often with black markings on the head. Most terns hunt fish by diving but some pick insects off the surface of fresh water. Terns are generally long-lived birds, with several species now known to live in excess of 25 to 30 years. There are 44 species worldwide and 8 species which occur in Guam.

[edit] Pigeons and Doves

Order: Columbiformes Family: Columbidae

Pigeons and doves are stout-bodied birds with short necks and short slender bills with a fleshy cere. There are 308 species worldwide and 4 species which occur in Guam.

[edit] Typical owls

Order: Strigiformes Family: Strigidae

Typical owls are small to large solitary nocturnal birds of prey. They have large forward-facing eyes and ears, a hawk-like beak, and a conspicuous circle of feathers around each eye called a facial disk. There are 195 species worldwide and 1 species which occurs in Guam.

[edit] Swifts

Order: Apodiformes Family: Apodidae

Swifts are small aerial birds, spending the majority of their lives flying. These birds have very short legs and never settle voluntarily on the ground, perching instead only on vertical surfaces. Many swifts have long swept-back wings that resemble a crescent or a boomerang. There are 98 species worldwide and 1 species which occurs in Guam.

  • Mariana Swiftlet Aerodramus bartschi

[edit] Kingfishers

Order: Coraciiformes Family: Alcedinidae

Kingfishers are medium-sized birds with large heads, long pointed bills, short legs, and stubby tails. There are 93 species worldwide and 2 species which occur in Guam.

[edit] Swallows and Martins

Order: Passeriformes Family: Hirundinidae

The Hirundinidae family is a group of passerines characterized by their adaptation to aerial feeding. Their adaptations include a slender streamlined body, long pointed wings and short bills with wide gape. The feet are designed for perching rather than walking, and the front toes are partially joined at the base. There are 75 species worldwide and 1 species which occurs in Guam.

[edit] Wagtails and Pipits

Order: Passeriformes Family: Motacillidae

The Motacillidae are a family of small passerine birds with medium to long tails. They include the wagtails, longclaws and pipits. They are slender, ground feeding insectivores of open country. There are 54 species worldwide and 1 species which occurs in Guam.

[edit] Old World warblers

Order: Passeriformes Family: Sylviidae

The family Sylviidae is a group of small insectivorous passerine birds. The Sylviidae mainly occur as breeding species, as the common name implies, in Europe, Asia and, to a lesser extent Africa. Most are of generally undistinguished appearance, but many have distinctive songs. There are 291 species worldwide and 1 species which occurs in Guam.

[edit] Fantails

Order: Passeriformes Family: Rhipiduridae

The Fantails are small insectivorous birds which are specialist aerial feeders. There are 44 species worldwide and 2 species which occur in Guam.

[edit] Monarch flycatchers

Order: Passeriformes Family: Monarchidae

The monarch flycatchers are small to medium-sized insectivorous passerines, which hunt by flycatching. There are 99 species worldwide and 1 species which occurs in Guam.

[edit] White-eyes

Order: Passeriformes Family: Zosteropidae

The white-eyes are small and are mostly of undistinguished appearance, the plumage above being generally either some dull color like greenish olive, but some species have a white or bright yellow throat, breast or lower parts, and several have buff flanks. As their name suggests many species have a white ring around the eyes. There are 96 species worldwide and 1 species which occurs in Guam.

[edit] Honeyeaters

Order: Passeriformes Family: Meliphagidae

The honeyeaters are a large and diverse family of small to medium-sized birds most common in Australia and New Guinea. They are nectar feeders and closely resemble other nectar-feeding passerines. There are 174 species worldwide and 1 species which occurs in Guam.

[edit] Drongos

Order: Passeriformes Family: Dicruridae

The drongos are mostly are black or dark grey in colour, sometimes with metallic tints. They have long forked tails, and some Asian species have elaborate tail decorations. They have short legs and sit very upright whilst perched, like a shrike. They flycatch or take prey from the ground. There are 24 species worldwide and 1 species which occurs in Guam.

[edit] Crows, Jays, Ravens and Magpies

Order: Passeriformes Family: Corvidae

The Corvidae family includes crows, ravens, jays, choughs, magpies, treepies, nutcrackers, and ground jays. Corvids are above average in size for the bird order Passeriformes. Some of the larger species show high levels of learning behavior. There are 120 species worldwide and 1 species which occurs in Guam.

[edit] Starlings

Order: Passeriformes Family: Sturnidae

Starlings are small to medium-sized passerine birds. Their flight is strong and direct, and they are very gregarious. Their preferred habitat is fairly open country. They eat insects and fruit. Plumage is typically dark with a metallic sheen. There are 125 species worldwide and 1 species which occurs in Guam.

[edit] Sparrows

Order: Passeriformes Family: Passeridae

Sparrows are small passerine birds. In general, sparrows tend to be small, plump, brown or grey birds with short tails and short powerful beaks. Sparrows are seed-eaters, and they also consume small insects. There are 35 species worldwide and 1 species which occurs in Guam.

[edit] See also

[edit] References