Brown Jay
Encyclopedia
The Brown Jay is a large American Jay
which has the habitus
of a magpie
, but is slightly smaller and with a shorter tail, though the bill is larger.
It occurs from Mexico
south into Central America
on the Gulf slope. The northernmost extent of the bird is on the Rio Grande
in southern Texas
, the lower region of the river called the Rio Grande Valley
, (of Texas).
.
Adults in both populations have black bills, legs, and feet. Immatures have yellow bare parts, including yellow eye-rings.
The voice is a loud but low pitched pee-ah call and is often modified to suit its situation or mood.
The nest is built in a tree or large shrub with both sexes helping in construction. There are normally three eggs laid but six is not unusual. Incubation is between 18 and 20 days. Only the female broods but the father feeds her while doing so.
Sometimes the young from another year will help in raising the chicks too. If a helper bird
returns with food, it will give it to one of the resident parents to feed the chicks.
; the range also appears on the Pacific
side of Central America in Nicaragua
, Costa Rica
, and western Panama
.
Jay
The jays are several species of medium-sized, usually colorful and noisy, passerine birds in the crow family Corvidae. The names jay and magpie are somewhat interchangeable, and the evolutionary relationships are rather complex...
which has the habitus
Morphology (biology)
In biology, morphology is a branch of bioscience dealing with the study of the form and structure of organisms and their specific structural features....
of a magpie
Magpie
Magpies are passerine birds of the crow family, Corvidae.In Europe, "magpie" is often used by English speakers as a synonym for the European Magpie, as there are no other magpies in Europe outside Iberia...
, but is slightly smaller and with a shorter tail, though the bill is larger.
It occurs from Mexico
Mexico
The United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of...
south into Central America
Central America
Central America is the central geographic region of the Americas. It is the southernmost, isthmian portion of the North American continent, which connects with South America on the southeast. When considered part of the unified continental model, it is considered a subcontinent...
on the Gulf slope. The northernmost extent of the bird is on the Rio Grande
Rio Grande
The Rio Grande is a river that flows from southwestern Colorado in the United States to the Gulf of Mexico. Along the way it forms part of the Mexico – United States border. Its length varies as its course changes...
in southern Texas
Texas
Texas is the second largest U.S. state by both area and population, and the largest state by area in the contiguous United States.The name, based on the Caddo word "Tejas" meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in...
, the lower region of the river called the Rio Grande Valley
Rio Grande Valley
The Rio Grande Valley or the Lower Rio Grande Valley, informally called The Valley, is an area located in the southernmost tip of South Texas...
, (of Texas).
Description
Brown Jays vary in plumage geographically: there are two main groups. Northern birds are almost completely dark brown, with lighter brown on the underparts. Southern birds are white-bellied and have bright white tips to the outer tailfeathers. The intergrade zone is in VeracruzVeracruz
Veracruz, formally Veracruz de Ignacio de la Llave officially Estado Libre y Soberano de Veracruz de Ignacio de la Llave , is one of the 31 states that, along with the Federal District, comprise the 32 federative entities of Mexico. It is divided in 212 municipalities and its capital city is...
.
Adults in both populations have black bills, legs, and feet. Immatures have yellow bare parts, including yellow eye-rings.
The voice is a loud but low pitched pee-ah call and is often modified to suit its situation or mood.
Ecology
Food is sought largely in trees but it also takes some food from the ground. Insects and a wide range of other invertebrates are taken, also lizards, fruit, and nectar. Though it does take eggs and nestlings, it appears not to if there is plenty of other foods available.The nest is built in a tree or large shrub with both sexes helping in construction. There are normally three eggs laid but six is not unusual. Incubation is between 18 and 20 days. Only the female broods but the father feeds her while doing so.
Sometimes the young from another year will help in raising the chicks too. If a helper bird
Helpers at the nest
Helpers at the nest is a term used in behavioural ecology and evolutionary biology to describe a social structure in which juveniles and sexually mature adolescents of either one or both sexes, remain in association with their parents and help them raise subsequent broods or litters, instead of...
returns with food, it will give it to one of the resident parents to feed the chicks.
Range
In Central America the Brown Jay is not found in El SalvadorEl Salvador
El Salvador or simply Salvador is the smallest and the most densely populated country in Central America. The country's capital city and largest city is San Salvador; Santa Ana and San Miguel are also important cultural and commercial centers in the country and in all of Central America...
; the range also appears on the Pacific
Pacific Ocean
The Pacific Ocean is the largest of the Earth's oceanic divisions. It extends from the Arctic in the north to the Southern Ocean in the south, bounded by Asia and Australia in the west, and the Americas in the east.At 165.2 million square kilometres in area, this largest division of the World...
side of Central America in Nicaragua
Nicaragua
Nicaragua is the largest country in the Central American American isthmus, bordered by Honduras to the north and Costa Rica to the south. The country is situated between 11 and 14 degrees north of the Equator in the Northern Hemisphere, which places it entirely within the tropics. The Pacific Ocean...
, Costa Rica
Costa Rica
Costa Rica , officially the Republic of Costa Rica is a multilingual, multiethnic and multicultural country in Central America, bordered by Nicaragua to the north, Panama to the southeast, the Pacific Ocean to the west and the Caribbean Sea to the east....
, and western Panama
Panama
Panama , officially the Republic of Panama , is the southernmost country of Central America. Situated on the isthmus connecting North and South America, it is bordered by Costa Rica to the northwest, Colombia to the southeast, the Caribbean Sea to the north and the Pacific Ocean to the south. The...
.
External links
- Juvenile bird with yellow bill
- VIREO: Brown Jay photo gallery
- Internet Bird Collection: Brown Jay videos
- Photo-High Res - greglasley.net
- Photoe-High Res; Article - otterside.com–"Crow/Jay Image page"