National Geographic. Birds, bird pictures, wild birds.
The Cornell Lab of Ornithology. All About Birds.Cornell University
eBird. Audubon and Cornell Lab of Ornithology
Audubon. National Audubon Society, Inc.
http://birds.audubon.org/faq/birds – Frequently asked questions on birds.
Birds.com NewMedia Holdings.
The Birds Directive. European Commission.
Smithsonian Migratory Bird Center. The National Zoological Park is a part of the Smithsonian Institution
Birds. 2022 Guardian News and Media Limited.
Avibirds, Almere, Netherlands 2001-2012 – Your source to the birds of Europe.
Giving nature a home. The Royal Society for the Protection of Birds (RSPB).
Bird Prints – The Complete Morris’s British Bird Pictures.
Birding Pal. Go Birding With A Pal From Around The World
www.fuglar.is Félag fuglaáhugamanna Hornafirði