Birds of the World

News

High Trend Resolution studies from 2007-2021 reveal North American bird populations are declining most severely in areas where they should be thriving.
May 1, 2025
“This is the first time we’ve had fine-scale information on population changes across such broad spatial extents and across entire ranges of species. And that provides us a better lens to understand the changes that are happening with bird populations,” said Amanda Rodewald, faculty director of the Center for Avian Population Studies at the Cornell Lab of Ornithology.
The tree of all birds, showing representatives from different families. Branches are colored by how many published studies contributed information to that relationship – brightest green is 10 or more, gray is 0. Species without phylogenetic information (~15%) were placed using curated taxonomic information. (Image created by Emily Jane McTavish, silhouettes from PhyloPic.org)
May 1, 2025
Colleagues at the Cornell Lab of Ornithology alongside Professor Emily Jane McTavish at the University of California, Merced have mapped the evolution of every known bird species.The resulting database can easily be shared and updated as additional studies are published. The researchers detailed how they created this novel evolutionary map in a paper published in the journal Proceedings of the National Academies of Science (PNAS).
BOW Discovery Webinars Kite
April 4, 2025
We recently wrapped up season three of the BOW Discovery Webinars. Thanks to all our distinguished speakers as well as the staff here at the Cornell Lab who makes them possible.
Masked Finfoot ML174579061
BOW Team April 4, 2025
Learn more about the Masked Finfoot, one of Asia’s most threatened waterbirds. This species has faced alarming population declines due to habitat loss and disturbance in low-lying, forested wetlands.
Per Alström, Associate Editor of Birds of the World
BOW Team March 28, 2025
Join us for the February Birds of the World (BOW) Discovery webinar on Integrative Taxonomy featuring Per Alström on Thursday, 20 February 2025
February 3, 2025
Presentation by Suresh Kumar, Senior Scientist in the Department of Endangered Species Management at the Wildlife Institute of India on the result of his studies tracking fine-scale movements and migration of the Amur Falcon.
Slender-billed Curlew ML725391
John C. Mittermeier November 27, 2024
26 Nov 2024 / Slender-billed Curlew (BOW; Search for Lost Birds), There have recently been some incredible stories of lost birds being rediscovered. The Black-naped Pheasant-pigeon was photographed after 126 years, the Santa Marta Sabrewing was found after 76 years, the New Britain Goshawk was documented for the first time in 55 years, to name a […]
Tomas
November 14, 2024
En este webinar, TOMÁS RIVAS FUENZALIDA, presidente e investigador principal de la Fundación Ñankulafkén presenta un resumen sobre los nuevos hallazgos para este particular grupo de aves.
American Herring Gull ML612653029
BOW Team October 17, 2024
The latest eBird/Clements avian taxonomy has been released, though things are still settling out. This year’s update involved 141 species gained through splits, 16 lumps, and three newly recognized species along with hundreds of updates to nomenclature, subspecies revisions, and other changes.
Avian Taxonomy 2024
BOW Team October 17, 2024
The 2024 taxonomy updates will be available in Birds of the World, eBird, Merlin, and Macaulay Library in November, 2024. Join Shawn, Pam, and Marshall as they discuss these changes in depth.
Birds of the World

Partnerships

A global alliance of nature organizations working to document the natural history of all bird species at an unprecedented scale.