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Costa Rica's birds range in size from the scintillant hummingbird, at 2.2 grams and 6 cm (2.4 in), to the huge jabiru, at 6.5 kg (14.3 lb) and 150 cm (60 in) (the American white pelican is heavier, but is an accidental species).
The clay-colored thrush is the national bird of Costa Rica. Although Costa Rica is a small country, it is in the bird-rich neotropical region and has a huge number of species for its area. The official bird list published by the Costa Rican Rare Birds and Records Committee of the Asociación Ornitológica de Costa Rica (AOCR) contained 948 ...
At close range, the vocalization of many in Costa Rica is heard as a complex three-part song, the "bonk" giving the bird its name. This hollow, wooden "bonk" is thought to be among the loudest bird calls on Earth, audible to humans from over 0.5 mi (0.80 km) away.
in Guanacaste province, Costa Rica in El Salvador. The adult rufous-backed wren is 17 cm (6.7 in) long and weighs 29 to 42 g (1.0 to 1.5 oz). There is some variation among the subspecies but generally they have a black crown and eyestripe separated by a white supercilium, a rufous nape, and cinnamon to chestnut upperparts streaked with black and white, especially on the rump.
In Costa Rica. The azure-hooded jay ranges in length from 11 to 12 inches (28 to 30 cm), [7] and it tends to weigh 3.52 ounces (100 g). [8] Its large size and frame help the bird manage the large amount of flying it does. [8]
A resplendent quetzal found in the Talamanca cloud forests of Costa Rica The resplendent quetzal is the largest trogon . [ 12 ] It is 36 to 40 cm (14–16 in) long; in the nominate subspecies , the tail streamers measure between 31 cm (12 in) and 100.5 cm (39.6 in), with the median being 75 cm (30 in) for males.
They have proportionally large heads for their body size and long wings and tails. The large head is dominated by a massive broad bill and enormous eyes. In the treatment of the family in the Handbook of the Birds of the World , Cohn-Haft describes the potoos as "little more than a flying mouth and eyes". [ 6 ]
The sexes are very different in size; the male is 50 cm (20 in) long and weighs 520 g (18 oz); the smaller female is 38 cm (15 in) long and weighs 230 g (8.1 oz). In total body mass, the males are 100% bigger than the females, which is a 2:1 body-to-mass ratio and makes the Montezuma oropendola one of the most sexually-dimorphic birds in the world.