Aserrí, San José, Costa Rica
|Range (click to magnify)|
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 tail feathers. The intergrade zone is in Veracruz, Mexico.
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.
Food is sought largely in trees but brown jays also take some food from the ground. They are rather indiscriminate feeders. Insects and a wide range of other invertebrates are taken, also lizards, nectar, and fruit (e.g. that of Trophis racemosa (Moraceae)). Though they will take eggs and nestlings, they appear not to if there is plenty of other food 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 male feeds her while doing so.
Sometimes the offspring from a previous season will help in raising the chicks. If a helper bird returns with food, it will give it to one of the resident parents to feed the chicks.
- BirdLife International (2012). "Psilorhinus morio". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
- Foster, Mercedes S. (2007). "The potential of fruiting trees to enhance converted habitats for migrating birds in southern Mexico". Bird Conservation International (BirdLife International) 17 (1): 45–61. doi:10.1017/S0959270906000554.
|Wikimedia Commons has media related to Psilorhinus morio.|
|Wikispecies has information related to: Psilorhinus morio|
- Juvenile brown jay with yellow bill photo by Monte M. Taylor at tsuru-bird.net
- Brown jay videos, photos, and sounds at the Internet Bird Collection
- Brown jay photo gallery at VIREO (Drexel University)
- Brown jay photos at greglasley.net
- Crow/Jay Image page with brown jay photos at otterside.com
- Brown jay species account at NeotropicalBirds (Cornell University)