Bird Fact Friday— Oilbird and Potoos

Adapted from pages 80-81 Birds of Central America:

Drawings of Potoos and Oilbirds (bottom right corner). Art by Dale Dyer.

The Oilbird (Steatornis caripensis) is a large, nocturnal, frugivorous bird with no close relatives. Found in Central and Southern America, these poorly known birds are perhaps a rare vagrant or local resident. Their breeding habits are unknown in Central America. These distinctive, large, and long-tailed birds are nocturnal, and frequently live in large caves in humid forested regions. They often appear “front heavy” as it perches with its head held awkwardly below the body. They primarily feed on palm fruits. Their call is a repeated, dry, clicking sound (chk-chk chk). 

Meanwhile, Potoos are large nocturnall birds that are remarkably cryptic as they perch motionless, with eyes closed, on their day roosts. Their loud, eerie nocturnal vocalizations are often the best clue to their presence. Northern Potoos (Nyctibius jamaicensis) are identifiable by their large yellow eyes, broad mouths, and small bills. Meanwhile, the Common Potoo also has large yellow eyes, but usually shows a long, narrow, blackish malar and irregular band of blackish spots on their breast. Finally, the Great Potoo is paler than other potoos, with very fine, sparse, dusky barring and vermiculations. 

Birds of Central America
Belize, Guatemala, Honduras, El Salvador, Nicaragua, Costa Rica, and Panama

By Andrew C. Vallely and Dale Dyer

Birds of Central America is the first comprehensive field guide to the avifauna of the entire region, including Belize, Guatemala, Honduras, El Salvador, Nicaragua, Costa Rica, and Panama. Handy and compact, the book presents text and illustrations for nearly 1,200 resident and migrant species, and information on all rare vagrants. Two hundred sixty detailed plates on convenient facing-page spreads depict differing ages and sexes for each species, with a special focus on geographic variation. The guide also contains up-to-date range maps and concise notes on distribution, habitat, behavior, and voice. An introduction provides a brief overview of the region’s landscape, climate, and biogeography.

The culmination of more than a decade of research and field experience, Birds of Central America is an indispensable resource for all those interested in the bird life of this part of the world.

  • Detailed information on the entire avifauna of Central America
  • 260 beautiful color plates
  • Range maps, text, and illustrations presented on convenient facing-page spreads
  • Up-to-date notes on distribution supported by an extensive bibliography
  • Special focus on geographic variation of bird species