The Thick-billed Vireo, Vireo crassirostris, is a small songbird

Songbird

A songbird is a bird belonging to the suborder Passeri of the perching birds . Another name that is sometimes seen as scientific or vernacular name is Oscines, from Latin oscen, "a songbird"...

. It breeds in the West Indies in the Bahamas, Turks and Caicos Islands

Turks and Caicos Islands

The Turks and Caicos Islands are a British Overseas Territory and overseas territory of the European Union consisting of two groups of tropical islands in the Caribbean, the larger Caicos Islands and the smaller Turks Islands, known for tourism and as an offshore financial centre.The Turks and...

, Cayman Islands

Cayman Islands

The Cayman Islands is a British Overseas Territory and overseas territory of the European Union located in the western Caribbean Sea. The territory comprises the three islands of Grand Cayman, Cayman Brac, and Little Cayman, located south of Cuba and northwest of Jamaica...

, Tortuga Island in Haiti

Haiti

Haiti , officially the Republic of Haiti , is a Caribbean country. It occupies the western, smaller portion of the island of Hispaniola, in the Greater Antillean archipelago, which it shares with the Dominican Republic. Ayiti was the indigenous Taíno or Amerindian name for the island...

 and on cay

Cay

A cay , also spelled caye or key, is a small, low-elevation, sandy island formed on the surface of coral reefs. Cays occur in tropical environments throughout the Pacific, Atlantic and Indian Oceans , where they provide habitable and agricultural land for hundreds of thousands of people...

s off the coast of Cuba

Cuba

The Republic of Cuba is an island nation in the Caribbean. The nation of Cuba consists of the main island of Cuba, the Isla de la Juventud, and several archipelagos. Havana is the largest city in Cuba and the country's capital. Santiago de Cuba is the second largest city...

. It occasionally can be found as a vagrant to south Florida

Florida

Florida is a state in the southeastern United States, located on the nation's Atlantic and Gulf coasts. It is bordered to the west by the Gulf of Mexico, to the north by Alabama and Georgia and to the east by the Atlantic Ocean. With a population of 18,801,310 as measured by the 2010 census, it...

 in the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

. The subspecies

Subspecies

Subspecies in biological classification, is either a taxonomic rank subordinate to species, ora taxonomic unit in that rank . A subspecies cannot be recognized in isolation: a species will either be recognized as having no subspecies at all or two or more, never just one...

 V. c. approximans of Providencia Island

Providencia Island

Isla de Providencia or Old Providence is a mountainous Caribbean island. Though it is closer to Nicaragua, it is part of the Archipelago of San Andres, Providencia and Santa Catalina, a department of Colombia, lying midway between Costa Rica and Jamaica...

 is sometimes treated as a subspecies of the Mangrove Vireo

Mangrove Vireo

The Mangrove Vireo is a species of bird in the Vireonidae family.It is found in Belize, Costa Rica, El Salvador, Guatemala, Honduras, Mexico, and Nicaragua....

 (V. pallens) or as a separate species, the Providencia Vireo.

This vireo

Vireo

The vireos are a group of small to medium-sized passerine birds restricted to the New World. They are typically dull-plumaged and greenish in color, the smaller species resembling wood warblers apart from their heavier bills...

 frequents bushes and shrubs in tropical thickets. The grass-lined nest is a neat cup shape, attached to a fork in a tree or bush branch. 2-3 dark-spotted white egg

Egg (biology)

An egg is an organic vessel in which an embryo first begins to develop. In most birds, reptiles, insects, molluscs, fish, and monotremes, an egg is the zygote, resulting from fertilization of the ovum, which is expelled from the body and permitted to develop outside the body until the developing...

s are laid. Both the male and female incubate the eggs.

The Thick-billed Vireo is approximately 14 cm in length. Its head and back are a greyish olive, and the underparts are buffy white. The wings and tail are dark, and there are two white wing bars on each wing. The eyes have dark iris

Iris (anatomy)

The iris is a thin, circular structure in the eye, responsible for controlling the diameter and size of the pupils and thus the amount of light reaching the retina. "Eye color" is the color of the iris, which can be green, blue, or brown. In some cases it can be hazel , grey, violet, or even pink...

es. Sexes are similar.It shows a yellow partial spectacle just above the bill.

The Thick-billed Vireos song is a variable and rapid six to seven note phrase, starting and ending with a sharp chick, very similar to the White-eyed Vireo

White-eyed Vireo

The White-eyed Vireo, Vireo griseus, is a small songbird. It breeds in the southeastern USA from New Jersey west to northern Missouri and south to Texas and Florida, and also in eastern Mexico, northern Central America, Cuba and the Bahamas....

, but slightly harsher in sound.

The diet of this species consists almost exclusively of insect

Insect

Insects are a class of living creatures within the arthropods that have a chitinous exoskeleton, a three-part body , three pairs of jointed legs, compound eyes, and two antennae...

s.