Leptodon cayanensis

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: Avebrevicauda
Cladus: Pygostylia
Cladus: Ornithothoraces
Cladus: Ornithuromorpha
Cladus: Carinatae
Parvclassis: Neornithes
Cohors: Neognathae
Cladus: Neoaves
Ordo: Accipitriformes

Familia: Accipitridae
Subfamilia: Perninae
Genus: Leptodon
Species: Leptodon cayanensis
Subspecies: L. c. cayanensis – L. c. monachus
Name

Leptodon cayanensis (Latham, 1790: 28) [org. comb. Falco cayanensis]
References

Latham, J. 1790. Index ornithologicus, sive systema ornithologiæ; complectens avium divisionem in classes, ordines, genera, species, ipsarumque varietates: adjectis synonymis, locis, descriptionibus, &c. Volumen I: pp. i–xviii, 1–466. Londini. (Leigh & Sotheby). BHL Reference page. [original description: p. 28]

Vernacular names
čeština: Luňákovec šedohlavý
English: Gray-headed Kite
español: Milano cabecigrís
português: Gavião-de-cabeça-cinza
Türkçe: Gri başlı çaylak

The gray-headed kite (Leptodon cayanensis) is a raptor found in open woodland and swamp forests. It shares the genus Leptodon with the extremely rare white-collared kite. It breeds from eastern Mexico and Trinidad south to Peru, Bolivia, Brazil and northern Argentina.
Description

The gray-headed kite is 46–53 cm in length and weighs 410-605 g. The adult has a grey head, black upperparts, white underparts, and a black tail with two or three white bars. The bill is blue and the legs grey. The flight is a deliberate flap-flap-glide.

Immature birds have three colour morphs; the light phase is similar to the adult, but has a white head and neck, with a black crown and eyestripe, black bill and yellow legs, closely resembling the Black-and-white hawk-eagle (Spizaetus melanoleucus). The rufous phase has a reddish neck with a white throat, black malar stripes and a black, long crest closely resembling the adult Ornate hawk-eagle (Spizaetus ornatus). The dark phase has a blackish head, neck and upper parts, and dark-streaked buff underparts closely resembling the Black hawk-eagle (Spizaetus tyrannus). The sophistication in the mimicry of these juveniles is remarkable and has only been described a few times. [3]
Ecology

The gray-headed kite feeds mainly on reptiles such as arboreal geckos, other lizards and snakes, but also takes frogs, molluscs and large insects (including larvae and combs of hornets, wasps and bees). It also feeds on eggs, young or injured birds.[4] It usually sits on an open high perch from which it swoops on its prey. The call is a mewling keow. The nest is made of sticks lined with grass and is built high in a tree. The clutch is one or two white eggs, purplish at one end and spotted brown.
References

BirdLife International (2020). "Leptodon cayanensis". IUCN Red List of Threatened Species. 2020: e.T22694967A168671612. doi:10.2305/IUCN.UK.2020-3.RLTS.T22694967A168671612.en. Retrieved 12 November 2021.
Gill F, D Donsker & P Rasmussen (Eds). 2020. IOC World Bird List (v10.2). doi : 10.14344/IOC.ML.10.2.
Menq, Willian (2013). "Mimicry in Birds of Prey" (PDF). whitehawkbirding.com.

Ferguson-Lees, J. & Christie, D.A. & Franklin, K. & Mead, D. & Burton, P.. (2001). Raptors of the world. Helm Identification Guides.

Immature, light morph in Pantanal, Brazil
In Tortuguero National Park, Costa Rica
Further reading

ffrench, Richard (1991). A Guide to the Birds of Trinidad and Tobago (2nd ed.). Comstock Publishing. ISBN 0-8014-9792-2.
Hilty, Steven L (2003). Birds of Venezuela. London: Christopher Helm. ISBN 0-7136-6418-5.
A guide to the birds of Costa Rica by Stiles and Skutch ISBN 0-8014-9600-4