THE CRESTED CARACARA

 

The crested caracara (Caracara plancus), is a bird of prey in the family Falconidae. As presently defined, the crested caracara is found in South America, the southern United States, including Florida, where it has been seen on the East coast as far as extreme eastern Seminole County, Florida (Lake Harney), where it is now considered a resident but listed as threatened. There have been reports of the crested caracara as far north as San Francisco, California.^[2] and, in 2012, near Crescent City, California.^[3] Some are believed to possibly be living in Nova Scotia, with numerous sightings throughout the 2010s.^[4] In July 2016 a northern caracara was reported and photographed by numerous people in the upper peninsula of Michigan, just outside of Munising.^[5][6][7] In June 2017, a northern caracara was sighted far north in St. George, New Brunswick, Canada.^[8] A specimen was photographed in Woodstock, Vermont in March 2020.^{[citation needed]} The species has recently become more common in central and north Texas and is generally common in south Texas and south of the US border.^{[citation needed]} It can also be found (nesting) in the Southern Caribbean (e.g. Aruba, Curaçao and Bonaire)^{[citation needed]}, Mexico, and Central America. It was formerly placed in the genus Polyborus.

 

Description

 

The crested caracara has a total length of 50–65 cm (20–26 in) and a wingspan of 120–132 cm (47–52 in). Its weight is 0.9–1.6 kg (2.0–3.5 lb), averaging 1,348 g (2.972 lb) in 7 birds from Tierra del Fuego.^[9][10] 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. In fact, they are the second largest species of falcon in the world by mean body mass, second only to the gyrfalcon.^[10] The cap, belly, thighs, most of the wings and tail-tip are dark brownish, the auriculars (feathers surrounding the ear), throat and nape are whitish-buff, and the chest, neck, mantle, back, uppertail-coverts, crissum (the undertail coverts surrounding the cloaca) 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.

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  Juvenile

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  Young adult

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  Adult

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  Adult in the Pantanal, Brazil

Behavior

 

A bold, opportunistic raptor, the 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 may also eat fruit. It is dominant over the black and turkey vulture at carcasses. The crested caracara will take live prey that has been flushed by wildfire, cattle, and farming equipment. The opportunistic nature of this species means that the crested caracara seeks out the phenomena associated with its food, e.g. wildfires and circling vultures.^[11] It is typically solitary, but several individuals may gather at a large food source (e.g. dumps). Breeding takes place in the Southern Hemisphere 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. The average clutch size is two eggs.

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  Young adult, showing the distinctive light 'windows' in the wings

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  Adult

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  Being mobbed by a fork-tailed flycatcher

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  Young adult perched on a cactus, Bonaire, BES Islands

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  Northern crested caracara (Caracara cheriway), Attwater Prairie Chicken National Wildlife Refuge, Colorado County, Texas, USA

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  An immature bird surveying the surroundings in Texas, USA

 

Distribution and habitat

 

The crested caracara occurs from Tierra del Fuego in southernmost South America north to the southern United States, Mexico, and Central America. 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.

 

Florida caracara

 

The state of Florida is home to a relict population of northern caracaras that dates to the last glacial period, which ended around 12,500 BP. At that point in time, Florida and the rest of the Gulf Coast was covered in an oak savanna. As temperatures increased, the savanna between Florida and Texas disappeared.^[12] Caracaras were able to survive in the prairies of central Florida as well as in the marshes along the St. Johns River. Cabbage palmettos are a preferred nesting site, although they will also nest in southern live oaks.^[13] Their historical range on the modern-day Florida peninsula included Okeechobee, Osceola, Highlands, Glades, Polk, Indian River, St. Lucie, Hardee, DeSoto, Brevard, Collier, and Martin counties.^[14] They are currently most common in DeSoto, Glades, Hendry, Highlands, Okeechobee and Osceola counties.^[15] Loss of adequate habitat caused the Florida caracara population to decline, and it was listed as threatened by the United States Fish and Wildlife Service in 1987.^[14]

 

Crested caracara in Mexico

 

The Mexican ornithologist Rafael Martín del Campo proposed that the northern caracara was probably the sacred "eagle" depicted in several pre-Columbian Aztec codices as well as the Florentine Codex. This imagery was adopted as a national symbol of Mexico, and is seen on the flag, among other places. Since the paintings were interpreted as showing the golden eagle, it became the national bird.^[16]

 

Texan eagle

 

Balduin Möllhausen, the German artist accompanying the 1853 railroad survey (led by Lt. Amiel Weeks Whipple) from the Canadian River to California along the 35th parallel, recounted observing what he called the "Texan Eagle", which, in his account, he identified as Audubon's Polyborus vulgaris. This sighting occurred in the Sans Bois Mountains in southeastern Oklahoma.^[17]

 

Status

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.