| Southern Crested Caracara | |
|---|---|
| In Piraju, Brasil | |
| Conservation status | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Order: | Falconiformes |
| Family: | Falconidae |
| Subfamily: | Polyborinae |
| Genus: | Caracara |
| Species: | C. plancus |
| Binomial name | |
| Caracara plancus (Miller, 1777) |
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| Synonyms | |
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Polyborus plancus |
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The Southern Crested Caracara (Caracara plancus), also known as the Southern Caracara, is a bird of prey in the family Falconidae. It formerly included the Northern Caracara (C. cheriway) of the southern United States, Mexico, Central America and northern South America, and the extinct Guadalupe Caracara (C. lutosa) as subspecies. As presently defined, the Southern Caracara is restricted to central and southern South America. As its relatives, it was formerly placed in the genus Polyborus.
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It has a total length of 50–65 cm (20–26 in) and a wingspan of 120-132 cm (47-52 in). Weight is 0.9-1.6 kg (2-3.5 lbs).[1] Individuals from the colder southern part of its range average larger than those from tropical regions (as predicted by Bergmann's rule) and are the largest type of caracara. The cap, belly, thighs, most of the wings and tail-tip are dark brownish, the auriculars, throat and nape are whitish-buff, and the chest, neck, mantle, back, uppertail-coverts, crissum and basal part of the tail are whitish-buff barred dark brownish. In flight, the outer primaries show a large conspicuous whitish-buff patch ('window'), as in several other species of caracaras. The legs are yellow and the bare facial skin and cere are deep yellow to reddish-orange. Juveniles resemble adults, but are paler, with streaking on the chest, neck and back, grey legs, and whitish, later pinkish-purple, facial skin and cere.
It can be separated from the similar Northern Caracara by its more extensive barring on the chest, brownish and often lightly mottled/barred scapulars (all blackish in Northern), and pale lower back with dark barring (uniform blackish in Northern). Individuals showing intermediate features are known from the small area of contact in north-central Brazil, but intergradation between the two species is generally limited.
A bold, opportunistic raptor, the Southern Crested Caracara is often seen walking around on the ground looking for food. It mainly feeds on carcasses of dead animals, but will steal food from other raptors, raid bird nests, and take live prey if the possibility arises (mostly insects or other small prey, but at least up to the size of a Snowy Egret). It is dominant over the Black and Turkey Vulture at carcasses. It is typically solitary, but several individuals may gather at a large food source (e.g. dumps). Breeding takes place in the austral spring/summer in the southern part of its range, but timing is less strict in warmer regions. The nest is a large open structure, typically placed on the top of a tree or palm, but sometimes on the ground. Average clutch size is two eggs.
The Southern Crested Caracara occurs from Tierra del Fuego in southernmost South America north to the Amazon River region and southern Peru. An isolated population occurs on the Falkland Islands. It avoids the Andean highlands and dense humid forest, such as the Amazon rainforest, where it is largely restricted to relatively open sections along major rivers. Otherwise, it occurs in virtually any open or semi-open habitat and is often found near humans.
Throughout most of its range, it is common to very common. It is likely to benefit from the widespread deforestation in tropical South America. It is therefore considered to be of Least Concern by BirdLife International.