Podilymbus podiceps

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Megaclassis: Osteichthyes
Cladus: Sarcopterygii
Cladus: Rhipidistia
Cladus: Tetrapodomorpha
Cladus: Eotetrapodiformes
Cladus: Elpistostegalia
Superclassis: Tetrapoda
Cladus: Reptiliomorpha
Cladus: Amniota
Classis: Reptilia
Cladus: Eureptilia
Cladus: Romeriida
Subclassis: Diapsida
Cladus: Sauria
Infraclassis: Archosauromorpha
Cladus: Crurotarsi
Divisio: Archosauria
Cladus: Avemetatarsalia
Cladus: Ornithodira
Subtaxon: Dinosauromorpha
Cladus: Dinosauriformes
Cladus: Dracohors
Cladus: Dinosauria
Ordo: Saurischia
Cladus: Eusaurischia
Subordo: Theropoda
Cladus: Neotheropoda
Cladus: Averostra
Cladus: Tetanurae
Cladus: Avetheropoda
Cladus: Coelurosauria
Cladus: Tyrannoraptora
Cladus: Maniraptoromorpha
Cladus: Maniraptoriformes
Cladus: Maniraptora
Cladus: Pennaraptora
Cladus: Paraves
Cladus: Eumaniraptora
Cladus: Avialae
Infraclassis: Aves
Cladus: Euavialae
Cladus: Avebrevicauda
Cladus: Pygostylia
Cladus: Ornithothoraces
Cladus: Ornithuromorpha
Cladus: Carinatae
Parvclassis: Neornithes
Cohors: Neognathae
Cladus: Neoaves
Cladus: Mirandornithes
Ordo: Podicipediformes

Familia: Podicipedidae
Genus: Podilymbus
Species: Podilymbus podiceps
Subspecies: P. p. antarcticus – P. p. antillarum – P. p. podiceps
Name

Podilymbus podiceps (Linnaeus, 1758)
Synonymy

Colymbus podiceps (protonym)

Podilymbus podiceps egg

References

Linnaeus, C. 1758. Systema Naturae per regna tria naturae, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Editio Decima, Reformata. Tomus I. Holmiæ (Stockholm): impensis direct. Laurentii Salvii. 824 pp. DOI: 10.5962/bhl.title.542 BHL p. 136 BHL Reference page.

Vernacular names
български: Пъстроклюн гмурец
brezhoneg: Plomer beg tev
català: Cabusset becgròs
čeština: Potápka americká
Cymraeg: Gwyach ylfinfraith
dansk: Tyknæbbet Lappedykker
Deutsch: Bindentaucher
English: Pied-billed Grebe
Esperanto: Makulbeka grebo
español: Zampullín Picogrueso
eesti: Vöötnokk-pütt
euskara: Txilinporta mokolodi
فارسی: کشیم نوک‌ابلق
suomi: Paksunokkauikku
føroyskt: Stúvgjør
français: Grèbe à bec bigarré
Gaeilge: Foitheach Gob-alabhreac
galego: Mergullón bicogroso
Avañe'ẽ: Myaka
עברית: טבלן עקוד-מקור
hrvatski: Šarenokljuni gnjurac
Kreyòl ayisyen: Plonjon fran
magyar: Gyűrűscsőrű vöcsök
íslenska: Stúfgoði
italiano: Podilimbo
日本語: オビハシカイツブリ
lietuvių: Margasnapis kragas
Nederlands: Dikbekfuut
norsk nynorsk: Ringnebbdukkar
norsk: Ringnebbdykker
Diné bizaad: Naalʼeełii keelóól yázhí
oj: ᑭᐳᑎᔭᐊᓱ`
polski: Perkozek grubodzioby
پنجابی: ڈبکھڑبی چنج ڈبکنی
português do Brasil: Mergulhão-caçador
português: Mergulhão-caçador
русский: Каролинская поганка
srpskohrvatski / српскохрватски: Šarenokljuni gnjurac - шаренокљуни гњурац
slovenčina: Potápka škvrnitozobá
slovenščina: Progastokljuni ponirek
svenska: Tjocknäbbad dopping
Türkçe: Kalın gagalı batağan
українська: Пірникоза рябодзьоба
中文: 斑嘴巨䴙䴘

The pied-billed grebe (Podilymbus podiceps) is a species of the grebe family of water birds. Because the Atitlán grebe (Podilymbus gigas) has become extinct, the Pied-Billed Grebe is now the sole extant member of the genus Podilymbus.[2] The pied-billed grebe is primarily found in ponds throughout the Americas.[3] Other names of this grebe include American dabchick, rail, dabchick, Carolina grebe, devil-diver, dive-dapper, dipper, hell-diver, pied-billed dabchick, pied-bill, thick-billed grebe, and water witch.[4][5]

Taxonomy and name

The pied-billed grebe was described by Carl Linnaeus in the 10th edition of his Systema Naturae in 1758 as Colymbus podiceps.[6] The binomial name is derived from Latin Podilymbus, a contraction of podicipes ("feet at the buttocks", from podici-, "rump-" + pes, "foot")—the origin of the name of the grebe order—and Ancient Greek kolymbos, "diver", and podiceps, "rump-headed", from podici- + New Latin ceps.[7]

Outside its own genus, the closest relatives of the pied-billed grebe are the small grebes of the genus Tachybaptus.[8]
Subspecies[9]

P. p. podiceps, (Linnaeus, 1758), North America to Panama & Cuba.
P. p. antillarum, (Bangs, 1913), Greater & Lesser Antilles.
P. p. antarcticus, (Lesson, 1842), South America to central Chile & Argentina.

Description

Pied-billed grebes are small, stocky, and short-necked. They are 31–38 cm (12–15 in) in length, with a wingspan of 45–62 cm (18–24 in) and weigh 253–568 g (8.9–20.0 oz).[10] They are mainly brown, with a darker crown and back.[11] Their brown color serves as camouflage in the marshes they live in.[12] They do not have white visible under their wings when flying, like other grebes.[13] Their undertail is white[11] and they have a short, blunt chicken-like bill that is a light grey color,[3][11] which in summer is encircled by a broad black band (hence the name). In the summer, its throat is black.[3] There is no sexual dimorphism.[13] Juveniles have black and white stripes and look more like winter adults.[3] This grebe does not have webbed feet. Its toes have lobes that come out of the side of each toe. These lobes allow for easy paddling.[3] When flying, the feet appear behind the body due to the feet's placement in the far back of the body.[11] Because of the feet placement, they are not able to walk on land.[14]

These grebes may be confused with the least grebe, although that species is much smaller and has a thinner bill. Other similarly sized grebes are very distinct in plumage, i.e. the eared grebe and horned grebe. Both species bear much more colorful breeding plumage, with rufous sides, golden crests along the side of the head against contrasting slaty color (also a rufous neck in the horned); while in winter, both the eared and horned grebes are pied with slaty and cream color and have red eyes. Because of the pied-billed grebe's duck-like habits, some inexperienced observers may confuse it with a duck.[15] However, pied-billed grebes have a very different bill shape (shorter, pointed at the tip, and flattened along the sides), as well as being shorter-necked and shorter-bodied than a duck. Also, unlike ducks, the closest living relatives of the grebe family are flamingos.[16]

Pied-billed grebes are part of the order Saurischia.
Vocalization

Its call is unique, loud and sounds like a "whooping kuk-kuk-cow-cow-cow-cowp-cowp."[17] Its call is similar to the yellow-billed cuckoo.[12]
Distribution and habitat

They are most commonly found throughout North America, Central America, the Caribbean, and South America year round. During the summer breeding season, they are most prevalent in central, northern and northeastern Canada.[3] If they live in an area where the water freezes in the winter they will migrate. Migrating birds generally meet with year-round birds in September and October.[18] They migrate at night.[3] Most migratory birds leave in March or April.[18] They make occasional appearances in Europe and Hawaii.[3] In the United Kingdom, pied-billed grebe visits have numbered 45 sightings as of 2019, appearing generally in October to January.[19] One bird in England bred with a little grebe, producing hybrid young.[20] It is the only grebe on record to have visited the Galapagos Islands.[21]

Pied-billed grebes are found in freshwater wetlands with emergent vegetation, such as cattails.[17] They are occasionally found in salt water. When breeding they are found in emergent vegetation near open water, and in the winter they are primarily found in open water due to the lack of nests to maintain. They may live near rivers, but prefer still water. They may be found in higher elevations when migrating.[18] They will breed in restored and man-made wetlands.[18]

Pied-billed grebes live approximately 10–12 years.[13]
Behaviour
Young chick swimming on Lake Washington

Pied-billed grebes rarely fly. They make a slow dive frequently, especially when in danger, diving to about 20 ft (6.1 m) or less.[3][13] They dive for about 30 seconds and may move to a more secluded area of the water, allowing only the head to be visible to watch the danger dissipate.[13] This frequency in diving has earned them the description of being reclusive or shy in nature.[17] It has also earned them nicknames like "hell-diver."[4] Pied-billed grebes can trap air in their feathers, which controls their buoyancy.[22] They rarely spend time in flocks.[18] Their courtship include calling and sometimes duets.[18] Males will show territorial behaviour if another male is at the edge of his territory. They face each other and then turn their heads and bills up. Then they turn away and start calling. Then they turn back around to look at one another.[13]
Breeding
P. podiceps eggs at Bogotá's Simón Bolívar Park

The pied-billed grebe breeds in south-central Canada, throughout the United States, Central America, the Caribbean, and temperate South America.[10] These grebes may lay up to two sets of eggs a year.[13] Their nests sit on top of the water, their eggs sitting in vegetation that resides in the water.[17] Grebes lay between three and ten bluish white smooth elliptical eggs with the female starting the incubation process.[3][13] They are incubated for around 23 days by both parents, with the female taking over incubation duties towards the end of that time period.[13][18] They will cover the nest with nesting material if they have to leave it for an extended period of time.[18]

Young grebes may leave the nest within one day of hatching. They are downy at birth. Yellow skin is seen between the lore and top of the head.[13] They do not swim well and stay out of the water. They sleep on their parents' backs. Within four weeks they start swimming.[3] When alerted they will climb on the back of a parent grebe and eventually mature to dive under the water like their parents.[3][17] Both parents share the role of raising the young – both feeding and carrying them on their backs.[18] Sometimes the parents will dive underwater to get food with the chicks on their backs.[13]
Diet
Adult with two juveniles feeding on a crawfish

Pied-billed grebes feed mainly on aquatic invertebrates, and also on small fish and amphibians (frogs, tadpoles). They dive to obtain food.[3] Their bills allow them to crush crustaceans, like crawfish.[3][18] They may also eat plants.[5] They have been shown to eat their own feathers, like other grebes, to aid in digestion (prevent injury from small bones).[23] They will also feed their feathers to their young.[18]
Threats

They are extremely sensitive to disturbances, especially by humans. While breeding, if scared, adults may abandon their nests without protecting the eggs. The waves from boats can destroy the nests and their sounds easily frighten the birds.[12]
In culture

Pied-billed grebe feathers are thick and soft. Their feathers were formerly used as decorations on hats and earmuffs and they were hunted in the eastern United States, in the 19th century.[12][13]
Status

The grebes are declining in New England. The reasons are unknown.[18] The states of Connecticut and New Hampshire have declared the pied-billed grebe as endangered. In New Jersey[12] and Massachusetts, they have been declared threatened. In Vermont they are of "special concern." In Rhode Island they are locally extinct.[13] Pied-billed grebes are protected under the Migratory Bird Treaty Act of 1918.

Habitat loss is the grebe's biggest threat. The draining, filling, and general destruction of wetlands causes a loss in their breeding habitats.[12] However, they are still common in the majority of their distribution areas.[18]
References

BirdLife International (2016). "Podilymbus podiceps". IUCN Red List of Threatened Species. 2016: e.T22696574A93571798. doi:10.2305/IUCN.UK.2016-3.RLTS.T22696574A93571798.en. Retrieved 11 November 2021.
Miller, Eliot (2018). "Out on a Limb: Birding in the Phylogenetic Tree". Living Bird (Autumn): 25.
"Pied-billed Grebe". Bird Guide. The Cornell Lab of Ornithology. Retrieved 12 August 2012.
"Pied-billed Grebe – Podilymbus podiceps". NatureWorks. Retrieved 12 August 2012.
"Pied-billed grebe". Birds. Illinois Natural History Survey. Retrieved 12 August 2012.
Linnaeus, Carolus (1758). Systema naturae per regna tria naturae, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Tomus I. Editio decima, reformata (in Latin). Stockholm: Laurentius Salvius. p. 136.
Cabard P. and Chauvet B. (2003). Etymologie des noms d'oiseaux Belin Eveil éditeur, France ISBN 2-7011-3783-7
Christidis, Les; Walter E. Boles (2008). Systematics and Taxonomy of Australian Birds. CSIRO. p. 67. ISBN 978-0643065116.
"Grebes". International Ornithological Congress. Retrieved 2015-01-06.
Muller, M. J., and R. W. Storer. Pied-billed Grebe (Podilymbus podiceps). In The Birds of North America, No. 410 (A. Poole and F. Gill, eds.). Philadelphia, PA: The Birds of North America, Inc., 1999.
"Pied-billed grebe Podilymbus podiceps". USGS. Retrieved 12 August 2012.
"Pied-billed Grebe, Podilymbus podiceps" (PDF). State of New Jersey. Retrieved 12 August 2012.
"Pied-billed Grebe". Department of Energy & Environmental Protection. State of Connecticut. Retrieved 12 August 2012.
"Loons and Grebes Are Land Locked".
"Pied-billed Grebe - This Bird is Not a Duck!". 22 July 2019.
"Exploring the relationship between flamingos and grebes: The wonderful birds – 10,000 Birds".
Fisher, Chris C. & Joseph Morlan (1996). Birds of San Francisco and the Bay Area. Auburn: Lone Pine Publishing. p. 19. ISBN 978-1-55105-080-5.
"Pied-billed Grebe". Grebes. Seattle Audubon Society. Retrieved 12 August 2012.
"Pied-billed Grebe Podilymbus podiceps". Grebes. British Trust for Ornithology. Retrieved 12 August 2012.
Newton, Ian (2008). The Migration Ecology of Birds. London, UK: Academic Press. p. 291. ISBN 978-0-12-517367-4.
Andy Swash; Rob Still (2005). Birds, Mammals, and Reptiles of the Galapagos Islands: An Identification Guide (2nd ed.). Yale University Press. p. 58. ISBN 978-0-300-11532-1. Retrieved 11 August 2012.
"Pied-billed Grebes Sink Like Submarines". 19 March 2018.
Ehrlich, Paul; David Dobkin, and Darryl Wheye (1988). The Birder's Handbook. New York: Simon and Schuster.