Yellow-billed tern


The yellow-billed tern is a small seabird found in South America. It is a species of tern in the family Laridae.
It is found in Argentina, Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Panama, Paraguay, Peru, Suriname, Trinidad and Tobago, Uruguay, and Venezuela.
Its natural habitats are rivers, swamps, and freshwater lakes.

Description

It measures approximately 23-25 centimeters in body length and weighs 40-57 grams. It has a yellow beak and feet, silvery grey wings and white underbody and forehead. Its crown, nape, and eyeline are black. Juveniles are brown and white without the black cap.

Nesting

It frequently nests alongside colonies of the large-billed tern and the black skimmer. The yellow-billed tern breeds from August to December on sand banks and island beaches. Non-breeding season habitats include coastal lagoons, river mouths, and rice fields. Their nests consist of shallow scrapes in the sand. Most commonly a clutch contains 2 eggs, but the yellow-billed tern can lay anywhere between 1–4 eggs. The incubation period is approximately 24 days. Nests are usually formed very close to each other. Terns aggressively defend their nests from predators, and other species such as the sand-colored nighthawk have been known to nest among tern colonies to take advantage of this anti-predator behavior.

Feeding

The yellow-billed tern forages during the day, mostly on small fish, shrimp, and insects. It feeds by hovering and picking fish from surface waters.