List of birds of Guam

This is a list of the bird species recorded in Guam. The avifauna of Guam include a total of 143 species as of August 2019, according to Bird Checklists of the World. [1] Of them, eight have been introduced by humans and 32 are rare or accidental. Four species are endemic, of which one is extinct and two are extinct in the wild though their reintroductions are either in progress or planned. Five species have been extirpated.

Guam rail

This list's taxonomic treatment (designation and sequence of orders, families and species) and nomenclature (English and scientific names) are those of The Clements Checklist of Birds of the World, 2019 edition.[2]

The following tags have been used to highlight several categories of occurrence.

  • (A) Accidental - a species that rarely or accidentally occurs in Guam
  • (End) Endemic - a species entirely confined to Guam in its natural distribution
  • (E) Extinct - a recent bird that no longer exists
  • (EW) Extinct in the wild - a species which only exists in captive breeding programs
  • (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


Ducks, geese, and waterfowl
Northern shoveler

Order: Anseriformes   Family: Anatidae

Anatidae includes the ducks and most duck-like waterfowl, such as geese and swans. These birds are adapted to an aquatic existence with webbed feet, flattened bills, and feathers that are excellent at shedding water due to an oily coating.

Megapodes
Micronesian scrubfowl

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 coloring.

Pheasants, grouse, and allies

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 vary in size) and have broad, relatively short wings.

Pigeons and doves
White-throated ground dove

Order: Columbiformes   Family: Columbidae

Pigeons and doves are stout-bodied birds with short necks and short slender bills with a fleshy cere.

Cuckoos

Order: Cuculiformes   Family: Cuculidae

The family Cuculidae includes cuckoos, roadrunners, and anis. These birds are of variable size with slender bodies, long tails, and strong legs.

Swifts

Order: Caprimulgiformes   Family: Apodidae

Swifts are small birds which spend 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 which resemble a crescent or boomerang.

Rails, gallinules, and coots
White-browed crake

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, making them difficult to observe. Most species have strong legs and long toes which are well adapted to soft uneven surfaces. They tend to have short, rounded wings and to be weak fliers. The Guam rail was formerly extinct in the wild but has been reintroduced to Rota and Cocos Island near Guam.[3]

Stilts and avocets

Order: Charadriiformes   Family: Recurvirostridae

Recurvirostridae is a family of large wading birds which includes the avocets and stilts. The stilts have extremely long legs and long, thin, straight bills.

Oystercatchers

Order: Charadriiformes   Family: Haematopodidae

The oystercatchers are large and noisy plover-like birds, with strong bills used for smashing or prising open molluscs.

Plovers and lapwings
Pacific golden-plover

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.

Sandpipers and allies
Common greenshank
Sanderling

Order: Charadriiformes   Family: Scolopacidae

Scolopacidae is 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 these species eat small invertebrates picked out of the mud or soil. Variation in length of legs and bills enables multiple species to feed in the same habitat, particularly on the coast, without direct competition for food.

Pratincoles and coursers

Order: Charadriiformes   Family: Glareolidae

The pratincoles have short legs, very long pointed wings, and long forked tails. Their most unusual feature for birds classed as waders is that they typically hunt their insect prey on the wing like swallows.

Gulls, terns, and skimmers
White tern

Order: Charadriiformes   Family: Laridae

Laridae is a family of medium to large seabirds, the gulls, terns, and skimmers. Gulls are typically gray or white, often with black markings on the head or wings. They have stout, longish bills and webbed feet. Terns are a group of generally medium to large seabirds typically with gray 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 known to live in excess of 30 years.

Tropicbirds
White-tailed tropicbird

Order: Phaethontiformes   Family: Phaethontidae

Tropicbirds are slender white birds of tropical oceans, with exceptionally long central tail feathers. Their heads and long wings have black markings.

Northern storm-petrels

Order: Procellariiformes   Family: Hydrobatidae

The northern storm-petrels are relatives of the petrels and are the smallest seabirds. They feed on planktonic crustaceans and small fish picked from the surface, typically while hovering. The flight is fluttering and sometimes bat-like.

Shearwaters and petrels

Order: Procellariiformes   Family: Procellariidae

The procellariids are the main group of medium-sized "true petrels", characterized by united nostrils with medium septum and a long outer functional primary.

Frigatebirds

Order: Suliformes   Family: Fregatidae

Frigatebirds are large seabirds usually found over tropical oceans. They are large, black and white, or completely black, with long wings and deeply forked tails. The males have colored inflatable 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.

Boobies and gannets

Order: Suliformes   Family: Sulidae

The sulids comprise the gannets and boobies. Both groups are medium to large coastal seabirds that plunge-dive for fish.

Herons, egrets, and bitterns
Yellow bittern

Order: Pelecaniformes   Family: Ardeidae

The family Ardeidae contains the bitterns, herons, and egrets. Herons and egrets are medium to large wading birds with long necks and legs. Bitterns tend to be shorter necked and more wary. Members of Ardeidae fly with their necks retracted, unlike other long-necked birds such as storks, ibises, and spoonbills.

Osprey

Order: Accipitriformes   Family: Pandionidae

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

Hawks, eagles, and kites

Order: Accipitriformes   Family: Accipitridae

Accipitridae is a family of birds of prey which includes 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.

Owls

Order: Strigiformes   Family: Strigidae

The 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.

Kingfishers
Guam kingfisher

Order: Coraciiformes   Family: Alcedinidae

Kingfishers are medium-sized birds with large heads, long pointed bills, short legs and stubby tails. An attempt to reintroduce the Guam kingfisher is in the planning stage as of early 2020.[4]

Rollers

Order: Coraciiformes   Family: Coraciidae

Rollers resemble crows in size and build, but are more closely related to the kingfishers and bee-eaters. They share the colorful appearance of those groups with blues and browns predominating.

Falcons and caracaras

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 talons.

Honeyeaters
Micronesian myzomela

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.

Fantails
Rufous fantail

Order: Passeriformes   Family: Rhipiduridae

The fantails are small insectivorous birds which are specialist aerial feeders.

Drongos

Order: Passeriformes   Family: Dicruridae

The drongos are mostly black or dark gray in color, 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 when perched, like a shrike. They flycatch or take prey from the ground.

Monarch flycatchers

Order: Passeriformes   Family: Monarchidae

The monarch flycatchers are small to medium-sized insectivorous passerines which hunt by flycatching.

Crows, jays, and magpies

Order: Passeriformes   Family: Corvidae

The family Corvidae includes crows, ravens, jays, choughs, magpies, treepies, nutcrackers, and ground jays. Corvids are above average in size among the Passeriformes, and some of the larger species show high levels of intelligence.

Reed warblers and allies

Order: Passeriformes   Family: Acrocephalidae

The family Acrocephalidae is a group of small insectivorous passerine birds. Most are of generally undistinguished appearance, but many have distinctive songs.

Swallows

Order: Passeriformes   Family: Hirundinidae

The family Hirundinidae is adapted to aerial feeding. They have a slender streamlined body, long pointed wings, and a short bill with a wide gape. The feet are adapted to perching rather than walking, and the front toes are partially joined at the base.

White-eyes
Bridled white-eye

Order: Passeriformes   Family: Zosteropidae

The white-eyes are small and mostly undistinguished, their plumage above being generally 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 each eye.

Starlings
Micronesian starling

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.

Old World flycatchers

Order: Passeriformes   Family: Muscicapidae

The Old World flycatchers form a large family of small passerine birds. These are mainly small arboreal insectivores, many of which, as the name implies, take their prey on the wing.

Waxbills, munias, and allies

Order: Passeriformes   Family: Estrildidae

The members of this family are small passerine birds native to the Old World tropics. They are gregarious and often colonial seed eaters with short thick but pointed bills. They are all similar in structure and habits, but have wide variation in plumage colors and patterns.

Old World sparrows
Eurasian tree sparrow

Order: Passeriformes   Family: Passeridae

Old World sparrows are small passerine birds. In general, sparrows tend to be small, plump, brown, or gray birds with short tails and short powerful beaks. Sparrows are seed eaters, but they also consume small insects.

Wagtails and pipits

Order: Passeriformes   Family: Motacillidae

Motacillidae is 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.

References
  1. Lepage, Denis (August 26, 2019). "Checklist of birds of Guam". Avibase bird checklists of the world. Retrieved April 8, 2020.
  2. Clements, J. F., T. S. Schulenberg, M. J. Iliff, S. M. Billerman, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2019. The eBird/Clements Checklist of Birds of the World: v2019. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/ Retrieved August 15, 2019
  3. "Guam Rail". Smithsonian's National Zoo & Conservation Biology Institute. Retrieved April 8, 2020.
  4. "Guam Kingfisher". Smithsonian's National Zoo & Conservation Biology Institute. Retrieved April 8, 2020.

See also
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