The Cocoi Heron (Ardea cocoi) in the Birds.

Day Herons
 Black-headed Heron
 Black Heron
 Capped Heron
 Cattle Egret
 Chinese Egret
 Chinese Pond-Heron
 Cocoi Heron
 Dimorphic Heron
 Dusky-gray Heron
 Eastern Reef-Heron
 Goliath Heron
 Gray Heron
 Great Blue Heron
 Great White-bellied Heron
 Great White Egret
 Green Heron
 Indian Pond Heron
 Intermediate Egret
 Javanese Pond-Heron
 Lava Heron
 Little Blue Egret
 Little Egret
 Madagascar Heron
 Madagascar Squacco Heron
 Pied Heron
 Purple Heron
 Reddish Egret
 Red-throated Heron
 Rufous-bellied Heron
 Snowy Egret
 Squacco Heron
 Striated Heron
 Tricolored Heron
 Western Reef-Heron
 Whistling Heron
 White-faced Heron
 White-necked Heron

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Cocoi Heron
Ardea cocoi

Cocoi Heron (Ardea cocoi) Uruguay, 1999.
Cocoi Heron (Ardea cocoi) in Uruguay


The Cocoi Heron (Ardea cocoi) is natural to Central America and South America. To the north its distribution extends to the Darien in Panama, and occasionally is seen in the Canal Zone. Except for the Andean high elevations, this egret inhabits most of South America, including the island of Trinidad. Some youngsters reach the Falkland Islands.


Normally this egret is found from sea level to 1200 meters of elevation, although in some places it is documented up to 3000 meters.


This egret is sedentary. The youngsters displace to far away places.


Found fishing at the water edge by the rivers and estuaries of fresh and brackish water.


Usually it is seen by itself and in pairs during the breeding season.


The breeding season starts according to location. Nesting is done in colonies and solitary. During early spring they start building the nest, normally on trees and bushes. The usual clutch is three light blue with white spots eggs. Incubation takes from 24 to 26 days.


The basic diet consists of fish, frogs and aquatic insects. Fishes by standing on the water edge. It is active all day and all night.

Cocoi Heron (Ardea cocoi) in Uruguay. 1999.
Cocoi Heron (Ardea cocoi)


The sexes have similar plumage, the basic colors are: white, gray and black. This is the largest heron in South America, in length it reaches from 1.00 to 1.30 meters.


The Cocoi Heron in Spanish is called “Garza Mora”, “Garza Cuca” y “Garza Morena”.

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Last revision: April 1, 2007
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