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Around the World for Albatrosses – Where to see all the albatross species – Text and photo’s: Otto Plantema – Printed in 2019 – Lay out: Henry Meulman and Otto Plantema – 148 pages
(Revenues from this book will granted to the Albatross Task Force)
Around the World for Penguins - Where to see all the 18 penguin species - Text and photo’s: Otto Plantema – Printed in 2020 - Lay out: Henry Meulman and Otto Plantema - 168 pages
(Revenues from this book will granted to Birdlife’s Marine Programme)
A Complete Guide to Antarctic Wildlife by Hadoram Shirihai and Illustrated by Brett Jarrett - Edited by Guy M. Kirwan - ALUL.A Press Oy, Finland - ISBN 9519894705
Alvo, R. 2015. Being a Bird in North America, North of Mexico (BABINA),
Volume 1: Waterfowl to Shorebirds. Ottawa: Robert Alvo. ISBN: 978-0-9877733-0-2 (v.1)
A GUIDE TO THE BIRDS OF MEXICO AND NORTHERN CENTRAL AMERICA by  Steve N. G. Howell, Sophie Webb - Oxford University Press - ISBN: 0198540124
A GUIDE TO THE BIRDS OF COLOMBIA by Steven L. Hilty and William L. Brown - Princeton University Press – ISBN 069108372X
A Field Guide to the Birds of South-East Asia by Craig Robson. New Holland Publishers. ISBN: 9781780090498
A photographic guide to Birds of the Philippines by Tim Fisher and Nigel Hicks. New Holland Publishers. ISBN: 9781847738301
A photographic guide to Birds of Vietnam, Cambodia and Laos by Peter Davidson. New Holland Publishers. ISBN: 9781847731418
BIRDS OF AFRICA SOUTH OF THE SAHARA by Ian Sinclair and Peter Ryan - Princeton University Press Princeton and Oxford - ISBN: 0691118159
BIRDS OF SOUTHERN AFRICA – By Ian Sinclair, Phil Hockey and Warwick Tarboton – Princeton Field Guides - Princeton and Oxford – ISBN: 0-691-09682-1
BIRDS OF ASIA AND AUSTRALIA  by David Alderton – Southwater - ISBN : 184215978X
BIRDS OF AUSTRALIA by Peter Rowland – Ed: Louise Egerton - ISBN: 1864363436
Birds Of Central America: BELIZE, GUATEMALA, HONDURAS, EL SALVADOR, NICARAGUA - De Andrew C. Vallely, Dale Dyer – Editeur: Princeton University Press, 2018 – ISBN: 0691138028, 9780691138022 - 584 pages
BIRDS OF EAST AFRICA vol 1 by C.A.W. Guggisberg – Mount Kenya Sundries Ltd. – ISBN: 9966889051
BIRDS OF PERU by Thomas S. Schulenberg, Douglas F. Stotz, Daniel F. Lane, John P. O’Neill, Theodore A. Parker III – Princeton University Press 2007 – ISBN: 978-0-691-13023-1
BIRDS OF SOUTH AMERICA – Passerines - by Robert S. Ridgely and Guy Tudor – HELM Field Guides – ISBN: 9781408113424
BIRDS OF THE GAMBIA AND SENEGAL by Clive Barlow and Tim Wacher – Helm Field guides – ISBN: 0713675497
BIRDS OF THE GREAT BASIN – by Fred A. Ryser, Jr - University of Nevada Press -ISBN: 0874170796
BIRDS OF PREY OF AFRICA AND ITS ISLANDS by Alan and Meg Kemp - Struik Publishers - ISBN: 1770073698
BIRDS OF PUNTA CANA – Dominican Republic – by David Rosane and Eloy Rodriguez - The Carriage House Press – 2002 – ISBN: 0971974500
BIRDS OF THE MIDDLE EAST by R.F. Porter, S. Christensen, P. Schiermacker-Hansen - C.Helm - ISBN: 0713670169
BIRDS OF THE WEST INDIES – by Herbert Raffaele, Kristin Williams et Tracy Pedersen – Helm – ISBN: 9780713649055
Birds of Western Ecuador: A Photographic Guide Par Nick Athanas, Paul J. Greenfield – Editeur: Princeton University Press, 2016 – ISBN: 140088070X, 9781400880706
Birds of Ecuador De Robin Restall, Juan Freile – Editeur: Bloomsbury Publishing, 2019 – ISBN: 147297249X, 9781472972491 - 576 pages
BIRDS OF VENEZUELA by Steven L. Hilty – Ed. Christopher Helm – ISBN: 0713664185
Birds of Madagascar and the Indian Ocean Islands Par Roger Safford, Adrian Skerrett, Frank Hawkins – ISBN: 1472924118, 9781472924117- Editeur: Bloomsbury Publishing, 2015
The Birds of Africa: Volume VIII: The Malagasy Region: Madagascar, Seychelles, Comoros, Mascarenes - Par Roger Safford, Frank Hawkins – ISBN: 1408190494, 9781408190494- Editeur: A&C Black, 2013
Birds of Madagascar: A Photographic Guide Par Pete Morris, Frank Hawkins – ISBN: 0300077556, 9780300077551- Editeur: Yale University Press, 1998
Birds of Melanesia: Bismarcks, Solomons, Vanuatu and New Caledonia Par Guy Dutson – Editeur : Bloomsbury Publishing, 2011 – ISBN: 1408152460, 9781408152461
Birds New to Science: Fifty Years of Avian Discoveries Par David Brewer – Editeur: Bloomsbury Publishing, 2018 – ISBN: 1472906292, 9781472906298 – 416 pages
Birds of the Indian Ocean Islands Par Ian Sinclair, Olivier Langrand - ISBN: 1868729567, 9781868729562- Editeur: Struik, 2003
A Photographic Guide to Birds of the Indian Ocean Islands: Madagascar ... Par Ian Sinclair, Olivier Langrand, Fanja Andriamialisoa - ISBN-10: 177007175X - ISBN-13: 978-1770071759 - Publisher: Struik Publishers (July 18, 2011)
Birds of the Horn of Africa: Ethiopia, Eritrea, Djibouti, Somalia and Socotra Par Nigel Redman, Terry Stevenson, John Fanshawe – Helm Fields Guides – Editeur: Bloomsbury Publishing, 2010 – ISBN: 1408135760, 9781408135761
Buntings and Sparrows Par Clive Byers,Urban Olsson,Jon Curson – Editeur : A&C Black, 2013 – ISBN: 1408189062, 9781408189061 – 264 pages
CROWS AND JAYS by Steve Madge – Ed. Christopher Helm – ISBN: 0713652071
Cuckoos of the World Par Johannes Erritzøe, Clive F. Mann, Frederik Brammer, Richard A. Fuller – Editeurs A&C Black, 2012 – ISBN: 1408142678, 9781408142677
The Cuckoos Par Robert B. Payne – Editeur : OUP Oxford, 2005 – ISBN : 0191513555, 9780191513558
Ducks, Geese and Swans: Species accounts (Cairina to Mergus) publié par Janet Kear – Editeur: Oxford University Press, 2005 – ISBN: 0198610092, 9780198610090 – 908 pages
ENCYCLOPEDIE DES OISEAUX DE FRANCE ET D’EUROPE – de Peter Hayman et Rob Hume - Flammarion – ISBN : 2082009920
FIELD GUIDE TO THE BIRDS OF NORTH AMERICA - National Geographic Society - ISBN: 0792274512
Field Guide to Australian Birds by Michael Morcombe - Editeur: Steve Parish Publishing Pty Ltd – ISBN-10: 187628210X -ISBN-13: 978-1876282103 - 448 pages
FINCHES AND SPARROWS by Peter Clement, Alan Harris and John Davis – Helm Identification Guides – ISBN: 0713652039
The Graham Pizzey & Frank Knight Field Guide to the Birds of Australia - Publisher: HarperCollins Publishers (Australia) Pty Ltd; Reprint. Edition (1996) - ISBN-10: 020718013X - ISBN-13: 978-0207180132 - 528 pages
GUIDE DES CANARDS, DES OIES ET DES CYGNES – de Steve Madge - Delachaux et Niestlé - ISBN: 2603013769
GUIDE DES LIMICOLES de D. Taylor - Delachaux et Niestlé - ISBN : 2603014080
GUIDE HEINZEL des Oiseaux d’Europe de Hermann Heinzel, Richard Fitter et John Parslow – Delachaux et Niestlé – ISBN : 2603014862
GUIDE DES RAPACES DIURNES – Europe, Afrique du Nord et Moyen-Orient de Benny Génsbol – Delachaux et Niestlé – ISBN : 2603013270
HANDBOOK OF THE BIRDS OF INDIA AND PAKISTAN – vol 3 – By Salim Ali and Dillon Ripley – OXFORD UNIVERSITY PRESS – ISBN: 195613023
HANDBOOK OF THE BIRDS OF INDIA AND PAKISTAN – vol 4 – By Salim Ali and Dillon Ripley – OXFORD UNIVERSITY PRESS - ISBN: 0195659376
HAWKS, EAGLES AND FALCONS OF NORTH AMERICA by Paul A. Johnsgard - Smithsonian Institution Press - ISBN: 1560989467
Hennache, A. & Ottaviani, M. (2005). Monographie des faisans, volume 1. Edition W.P.A. France, Clères, France. ISBN: 2-9512467-1-4
Hennache, A. & Ottaviani, M. (2006). Monographie des faisans, volume 2. Edition W.P.A. France, Clères, France.ISBN: 2-9512467-2-2
Hennache, A. & Ottaviani, M. (2011). Monographie des faisans - 400 pages. Editions W.P.A. France, Clères, France. ISBN 978-2-9512467-3-7
KNOW YOUR NEW ZEALAND BIRDS by Lynnette Moon - New Holland Publishers – ISBN: 1869660897
L’ENCYCLOPEDIE MONDIALE DES OISEAUX - Dr Christopher M. Perrins -  BORDAS - ISBN: 2040185607
LE GUIDE ORNITHO par Grant, Mullarney, Svensson, Zetterström - Delachaux Niestle - ISBN: 2603011421
LES AIGLES par Maurice Dupérat - Artémis Editions - ISBN: 2844164536
Les Oiseaux à berceaux - Histoire naturelle et photographies, 262 pages.Michel Ottaviani, (2014). Editions Prin, France. ISBN 978-2-909136-41-7
Les Oiseaux de paradis – Histoire Naturelle et photographies - par Michel Ottaviani - Editions Prin, France – ISBN : 2-909136-40-X
LES OISEAUX D’EUROPE ET D’AFRIQUE DU NORD par Hermann Heinzel, Richard Fitter, John Parslow - Delachaux Niestlé - Isbn : 2603014862
LES OISEAUX DE THAILANDE par Roland Eve et Anne-Marie Guigue - Times Editions - ISBN: 9812042008
Madagascar Wildlife: A Visitor's Guide Par Nick Garbutt, Hilary Bradt, Derek Schuurman – ISBN: 1841622451, 9781841622453 - Editeur: Bradt Travel Guides, 2008
Martins-pêcheurs, martins-chasseurs, guêpiers et rolliers par Hilary Fry et Kathie Fry – Vigot – ISBN : 2711412679
Munias and Mannikins by Robin Restall – Editeur: A&C Black, 2010 – ISBN: 1408135450, 9781408135457
NEW WORLD BLACKBIRDS – THE ICTERIDS by Alvaro Jaramillo and Peter Burke – Helm - ISBN : 0713643331
NIGHTJARS - A Guide to Nightjars and Related Nightbirds – Nigel Cleere and Dave Nurney - Yale University Press - First Edition (August 11, 1998) - ISBN 10: 0300074573 / ISBN 13: 9780300074574
OISEAUX DE GUYANE by Olivier Tostain, Jean-Luc Dujardin, Christian Erard et Jean-Marc Thiollay - S.E.O (Société d'études ornithologiques) - ISBN: 2950654800
OISEAUX DE LA REUNION par Armand Barau - Nicolas Barré - Christian Jouanin - Editions Orphie - ISBN : 2877632636
OISEAUX DE MER – Guide d’identification de Peter Harrison – Editions Broquet (Canada) – ISBN-10 : 2890004090 – ISBN-13 : 978-2890004092
Ottaviani, M. (2008) Monographie des Fringilles (fringillinés – carduélinés) – Histoire Naturelle et photographies, Volume 1. Editions Prin, Ingré, France, 488 p.
Ottaviani, M. (2011a). Monographie des Fringilles (carduélinés) – Histoire Naturelle et photographies, volume 2. Editions Prin, Ingré, France, 286 p.
Ottaviani, M. (2011b). Monographie des Fringilles (carduélinés) – Histoire Naturelle et photographies, volume 3. Editions Prin, Ingré, France, 320 p.
OWLS OF THE   WORLD – By Claus König, Friedhelm Weick and Jan-Hendrik Becking - IBSN 978-0-7136-6548-2
Owls of the World - A Photographic Guide: Second Edition – By Heimo Mikkola – Editeur: A&C Black, 2014 – ISBN: 147290592X, 9781472905925
Owls and Owling in Southern Africa by Warwick Tarboton and Rudy Erasmus - Tracey Hawthorne - ISBN: 1868721043
PARROTS OF THE WORLD – An Identification Guide – by Joseph M. Forshaw – Princeton University Press – ISBN 0691092516
PHEASANTS, PARTRIDGES AND GROUSES – By Steve Madge and Phil Mc Gowan – Helm Identification Guides. ISBN: 0713639660
PIGEONS AND DOVES by David Gibbs, Eustace Barnes and John Cox - Pica Press Sussex - ISBN: 1873403607
Pittas, Broadbills and Asities by Franck Lambert - Pica Press - ISBN: 1873403240
PORTRAITS D’OISEAUX GUYANAIS - Groupe d'étude et de protection des oiseaux en Guyane (GEPOG) - Ibis rouge éditions - ISBN: 2844501842
RAILS - Barry Taylor and  Ber Van Perlo - Pica  Press - IBSN 1873403593
RAPTORS OF THE WORLD by James Ferguson-Lees et David Christie - Helm Identification Guides – ISBN: 0713680261
Raptors of Mexico and Central America De William S. Clark, N. John Schmitt – Editeur: Princeton University Press, 2017 – ISBN: 1400885078, 9781400885077 - 272 pages
Reed and Bush Warblers Par Peter Kennerley, David Pearson – Helm Identification Guides - Editeur: A&C Black, 2010 – ISBN: 1408134012, 9781408134016
ROBERTS BIRDS OF SOUTH AFRICA by G. R. Mc Lachlan and R. Liversidge – The Trustees of the John Voelcker Bird Book Fund – ISBN: 0620031182
SHOREBIRDS by Peter Hayman, John Marchant and Tony Prater – Christopher Helm – 1986 – ISBN: 0747014035
SKUAS AND JAEGERS by Klaus Malling Olsen and Hans Larsson - Pica Press Sussex,
SPARROWS AND BUNTINGS – Clive Byers - Houghton Mifflin Company - ISBN: 03957387
STARLINGS AND MYNAS, by Chris Feare and Adrian Craig. Christopher HELM - ISBN: 071353961X
SUNBIRDS by Roberts A. Cheke, Clive F. Mann and Richard Allen Helm, 2001 - ISBN : 1873403801
Swifts: A Guide to the Swifts and Treeswifts of the World, Second Edition Hardcover – January 1, 1995 – By Phil Chantler – Pica Press – ISBN: 0300079362 – 978-0300079364 – 237 pages
TANAGERS: Natural History, Distribution and Identification (Helm Identification Guides) - By Morton L. Isler and Phyllis R. Isler - Christopher Helm Publishers Ltd; New edition (30 April 1999) - ISBN-10: 0713651164
Toucans, Barbets, and Honeyguides: Ramphastidae, Capitonidae and Indicatoridae par Lester Short,Jennifer F. M. Horne – Editeur: OUP Oxford, 2001 – ISBN: 0198546661, 9780198546665
The Illustrated Encyclopedia of Birds De DK, BirdLife International – Editeur: Dorling Kindersley Ltd, 2011 – ISBN: 1405336161, 9781405336161 - 512 pages
THE COMPLETE BOOK OF BRITISH BIRDS – Written by “Royal Society for the Protection of Birds” experts - Préface de Magnus Magnusson - Michael Cady- Rob Hume Editors - ISBN: 0749509112
THE HANDBOOK OF BIRD IDENTIFICATION FOR EUROPE AND THE WESTERN PALEARCTIC by Mark Beaman, Steve Madge - C. Helm - ISBN: 0713639601
THE HERON HANDBOOK by James Hancock and James Kushlan- CROOM HELM – IBSN: 0709937164
THRUSHES by Peter Clement and Ren Hathway – HELM - ISBN: 0713639407
TROPICAL BIRDS OF SOUTHEAST ASIA by Morten Strange - Tuttle Publishing - ISBN: 9625931678
HANDBOOK OF THE BIRDS OF THE WORLD vol 1 by Josep del Hoyo-Andrew Elliot-Jordi Sargatal - Lynx Edicions - ISBN: 8487334105
HANDBOOK OF THE BIRDS OF THE WORLD Vol 2 by Josep del Hoyo-Andrew Elliot-Jordi Sargatal - Lynx Edicions - ISBN: 8487334156
HANDBOOK OF THE BIRDS OF THE WORLD Vol 3 by Josep del Hoyo-Andrew Elliott-Jordi Sargatal - Lynx Edicions - ISBN : 8487334202
HANDBOOK OF THE BIRDS OF THE WORLD vol 4 by Josep del Hoyo-Andrew Elliott-Jordi Sargatal - Lynx Edicions - ISBN: 8487334229
HANDBOOK OF THE BIRDS OF THE WORLD Vol 5 by Josep del Hoyo-Andrew Elliott-Jordi Sargatal - Lynx Edicions - ISBN: 8487334253
HANDBOOK OF THE BIRDS OF THE WORLD Vol 6 by  Josep del Hoyo-Andrew Elliott-Jordi Sargatal - Lynx Edicions, 2001 - ISBN: 848733430X
HANDBOOK OF THE BIRDS OF THE WORLD Vol. 7 by Josep del Hoyo-Andrew Elliott-Jordi Sargatal – Lynx Edicions – ISBN: 8487334377
HANDBOOK OF THE BIRDS OF THE WORLD Vol 8 By Josep del Hoyo-Andrew Elliott-David Christie - Lynx Edicions - ISBN: 8487334504
HANDBOOK OF THE BIRDS OF THE WORLD Vol 9 - by Josep del Hoyo - Andrew Elliot - David Christie - Lynx Edicions - ISBN: 8487334695
HANDBOOK OF THE BIRDS OF THE WORLD Vol 10 by Josep del Hoyo-Andrew Elliott-David Christie - Lynx Edicions - ISBN: 8487334725
HANDBOOK OF THE BIRDS OF THE WORLD Vol 11 by Josep del Hoyo, Andrew Elliott and David Christie - Lynx Edicions - ISBN: 849655306X
HANDBOOK OF THE BIRDS OF THE WORLD Vol 12 by Josep del Hoyo-Andrew Elliott-David Christie - Lynx Edicions - ISBN: 8496553423
HANDBOOK OF THE BIRDS OF THE WORLD Vol 13 by Josep del Hoyo-Andrew Elliot-Jordi Sargatal - Lynx Edicions – ISBN: 9788496553453
HANDBOOK OF THE BIRDS OF THE WORLD Vol 14 by Josep del Hoyo-Andrew Elliot-David Christie - Lynx Edicions – ISBN: 9788496553507
HANDBOOK OF THE BIRDS OF THE WORLD Vol 15 by Josep del Hoyo-Andrew Elliot-David Christie - Lynx Edicions – ISBN: 9788496553682
HANDBOOK OF THE BIRDS OF THE WORLD Vol 16 by Josep del Hoyo- Andrew Elliot-David Christie – Lynx Edicions – ISBN: 9788496553781
Wildlife of Madagascar par Ken Behrens,Keith Barnes - ISBN: 140088067X, 9781400880676 – Editeur: Princeton University Press, 2016
WRENS, DIPPERS AND THRASHERS by Brewer David – illustrated by Barry Kent Mackay- Yale University Press - ISBN: 0300090595
WOODPECKERS, an identification guide of the woodpeckers of the world by Winkler Hans and Christie David – Helm – ISBN: 0395720435
About.com – Birding / Wild Birds
Aqua-Firma – Water – Wilderness – Wildlife
The Cornell Lab of Ornithology - Birds of the World
AMNH DSpace Digital Repository - American Museum of Natural History
Animal Diversity Web (University of Michigan Museum of Zoology)
ANIMALS – Explore, discover, connect
Arthur Grosset's Birds (Arthur Grosset)
Australian Antarctic Division: Leading Australia's Antarctic Program
AVES ARGENTINAS – Asociación Ornitológica del Plata
Birding, nature, conservation and the wide, wide world
BirdsCaribbean - Society for the Conservation and Study of Caribbean Birds (SCSCB)
Bird Ecology Study Group
Birds & Co – Les Oiseaux de Martinique
Birds & Seals of the Falkland Islands
Bird Friends of San Diego County (Audubon Society)
Birds Home - Watching Birds
Bird Houses 101 - North American Bird Species that Nest In Birdhouses
Birdinfo – Articles and News
Birding Patagonia – Adventure expeditions
Birds In SA - Bird Species Of South & Southern Africa
Birds of Britain - The Web Magazine for Birdwatchers
Birds of Falkland Islands
Bird Web (Seattle Audubon Society)
Birdlife International – Data Zone
BirdLife International (BirdLife International)
Birds in backyards (Birds Australia and Australian Museum)
Birds in backyards and in the Wild
Birds in Suriname, South America (Jan Hein Ribot)
Birds of Nova Scotia (Robie Tufts)
Birds of Oklahoma (Bill Horn)
Birds of Southern Africa (Tony Roocroft)
BIRDS of THE WORLD - An Online Bird Book
Birds of the World - A blog dedicated to the thousands of bird species that fly, swim or walk on our planet.
Birds songs of the Yucatan Peninsula (Dan Mennil's)
Bird Words - The official site of Dominic Couzens, natural history writer
Birdwatch – The Home of Birding
Blakiston’s Fish Owl Project
British Columbia Adventure Network
BTO Looking out for Birds
Chatham Islands, New Zealand
Chipper Woods Bird Observatory
CREAGUS@Monterey Bay (Don Roberson)
Cuba Explorer - Birds of Cuba - Endemic and near endemic birds of Cuba
Delaware Valley Raptor Center
Department of Sustainability, Environment, Water, Population and Communities
Designing a Future for Hawaii's Wildlife: Planning for Species of Greatest Conservation
Discovering the birds of Trinidad and Tobago (Brian Ramsey)
e Nature (National Wildlife Federation)
El Zoológico Electrónico (Damisela)
Exploring the Southwest Desert USA
Fatbirder - The World’s Richest Information Resource about Birds for Birders
Gbwf.org - Dedicated to the Aviculture and Conservation of the World’s Galliformes
Global Raptor Information Network - Working to Conserve Birds of Prey in nature
Houston Audubon Society (National Audubon Society)
Hummingbird Pictures Guide (Member of Fohn net)
INBio – Costa Rica
INPM – Inventaire National du Patrimoine Naturel
Imago Mundi – Encyclopédie gratuite
Institut de l’Information Scientifique et Technique
Instituto de Biología - Universidad Nacional Autónoma de México
IOC World Bird List
Island Life - Darwin's Finches
Israeli Birds (Gorfin Uri)
J. Berton C. Harris - News on migration timing in Asian birds
JUMARA.com.ar - La conservación parte del conocimiento
KUKILA – The Journal of Indonesian ornithology
Lake Milton Raptor Education Center
Las alas del invierno - La migración de la Grulla Común
Les Manchots (François Durand)
Los Angeles Zoo and Botanical Gardens
Malaysian Birds - Birds’ photos, videos, bird calls & information by Khong Tuck Khoon
Midway Atoll National Wildlife Refuge
National Park Service – Channel Islands
National Zoo – Smithsonian National Zoological Park
Nature Reserve & Biological Field Station -Un poco del Chocó-
Neomorphus, a site devoted to research, conservation and exploration in the tropics
New Zealand birds and birding (Narena Olliver)
New Zealand Birds Online
New Zealand bird status between 2008 and 2012
Northern Prairie Wildlife Research Center
Notornis and Birds New Zealand
Ocean Wanderers "Ride the Wave"
Ornithomedia - Le Web de l’Ornithologie
Owling.com - The largest US website totally dedicated to owls
Oxford Journals – Molecular Biology and Evolution
Patuxent Bird Identification Info Center
Pájaros de España (JL Beamonte)
PCO’s Projects, Activities & Services
Penguins of the world (Mike Bingham)
PENGUINWORLD (Lloyd Spencer Davis)
Peru Aves - Peru Birds
PhotoVolcanica - Photography and Information by Dr Richard Roscoe
Portfolio. Dr Ellen K. Rudolph - A Conservation Collection
ProAves - Por la Conservación en el País de las Aves
Programa de conservación del Águila Imperial ibérica – SEO BirdLife
Protecting the wildlife of the Falkland Islands
Red List of Threatened species
Research at Hilton Pond (Bill Hilton Jr)
Roberts Online – Birds of Southern Africa
SAN DIEGO ZOO - Birds
Science Daily – Your source for the latest research news
Scientific Electronic Library Online
Sea Birds – Galapagos Islands
SORA Searchable Ornithological Research Archive (Blair O. Wolf)
South Dakota Birds and Birding – (Terry L. Sohl)
Stability of Altered Forest Ecosystems – S.A.F.E Project
Stanford University - Birds of Stanford
Sungei Buloh Wetlands Reserve (Michael Mastaller)
Surfbirds.com - For birders all over the world
Te Ara – The Encyclopedia of New Zealand
The Birds of Ecuador
The British Birds – Birds from Great Britain
The IUCN Red List of Threatened Species
The Natural Heritage Collection
The Peregrine Fund – World Centre for Birds of Prey
THE AVIANWEB - Beauty of Birds (Sibylle Faye)
The Birds of North America online
The Cornell Lab of Ornithology – Neotropical birds
The Owl Pages (Deane P.Lewis)
The Royal Society Publishing
The Sea Duck Joint Venture - A Conservation Partnership under the North American Waterfowl management Plan