Many thanks to author Agustin Casale, a doctoral fellow at the Museo Argentino de Ciencias Naturales in Argentina, for his recent account revision for Hooded Siskin, a widespread and conspicuous finch of South America. @agustincasale19.bsky.social birdsoftheworld.org/bow/species/...

Good afternoon, bird people. Tell us what Birds in the World are you seeing today? Bonus if you grab a link to the species account from BOW! We'll go first: Horned Lark in New York: birdsoftheworld.org/bow/species/...

A reminder that Birds of the World features an in-depth ornithological glossary. If interested, head over to: birdsoftheworld.org/bow/support/...

Eastern Red-Legged Thrushes are found in Hispaniola, Puerto Rico, and Dominica. When defending territory, females were observed being more aggressive towards intruders. Males chase each other, often crashing mid-air and continuing to fight on the ground. birdsoftheworld.org/bow/species/relthr3

Though the Black-eared Catbird of New Guinea and Australia is classified as a bowerbird (Ptilonorhynchidae), males do not construct courtship bowers. Pairs are monogamous as well, further separating this species and others in its genus from other bowerbirds. birdsoftheworld.org/bow/species/bkecat4

Lilacine Amazon is endemic to Ecuador and is Critically Endangered with population estimates of less than 2,500. As forests are cleared for crop plantations, wood extraction, and urban expansion, this parrot’s suitable habitat is rapidly disappearing. birdsoftheworld.org/bow/species/relpar9

Put it on your calendar! 16 April 2026... 12:00 pm ET

In 2025, the Red Grouse was (finally) elevated to species status via AviList. Heather provides essential cover and predominates the diet of this bird year-round, sometimes entirely. As a result, its distribution is closely tied to managed heather moorlands in Britain and Ireland.

🦜🌏 One of the perks of being an Indiana Audubon member, besides early access to the Indiana Dunes Birding Festival, is FREE access to @birdsoftheworld.bsky.social. Our next access update happens in the first week of March! Become a member now to get this benefit: indianaaudubon.org/membership

Volunteers wanted! Are you passionate about birds, science, and and sharing? If so, there is a place for you in Birds of the World! We partner with both individuals and institutions to curate deep scientific content on birds. birdsoftheworld.org/bow/content/...

The Eastern Rockhopper Penguin is listed as a Vulnerable species, as several colonies have lost up to 94% of their population since the 1940s. Major threats include disease outbreaks and mudslides due to overgrazing from introduced livestock and rabbits. birdsoftheworld.org/bow/species/rocpen3

Critically endangered, the Antioquia Brushfinch is range-restricted to the northern Central Andes in Colombia. In 1971, this small bird was considered extinct but was thankfully rediscovered in 2018. Recent expeditions have found even more viable populations! birdsoftheworld.org/bow/species/antbrf1

The Sharp-billed Treehunter is a nimble forager, often hanging upside down as it flits on trees and vine tangles gleaning for insects. Its small size and agility allow it to find prey often hidden to other species. Click here to see these acrobats in action: birdsoftheworld.org/bow/species/shbtre1

Don't miss this semianr featuring one of the world's foremost experts on the conservation of Asian vultures, Chris Bowden, MBE, with the RSPB and Saving Asia’s Vultures from Extinction (SAVE). Next Thursday! birdsoftheworld.org/bow/news/asi...

Today is a great day to review the Phylogeny of all the Birds of the World! birdsoftheworld.org/bow/phylogeny

Free webinar on Asian Vulture Conservation, featuring Chris Bowden, MBE.

What does Streaked Shearwater have in common with the ...werewolf? They both hunt under a full moon! Though they are spotted feeding either day or night, these seabirds will take advantage of bright moonlight to catch fish like the Japanese anchovy. birdsoftheworld.org/bow/species/strshe

The Slender-Billed Parakeet is an endemic Chilean parrot specializing in manipulating the seeds of pehuén (Araucaria araucana) with its long, sharp bill. It feeds on the fruits and flowers of many other plants and uses its bill to dig out roots. birdsoftheworld.org/bow/species/slbpar1

Usually described as “raucous” and “cacophonous,” the Brown Cacholote is an energetic South American ovenbird. The bird announces its presence by performing its long, loud series of grating notes from treetops. Listen to some duets here: birdsoftheworld.org/bow/species/brncac1

As its name suggests, the Pygmy Palm Swift prefers to nest between palm fronds. The nest itself is primarily constructed of the feathers of other birds, and the swift attaches it to palm fronds using its saliva. Click here to learn more: birdsoftheworld.org/bow/species/pygswi1

Taxonomy and phylogeny are two sides of the same coin, but that doesn't mean they are always in agreement. I wrote a blog post on why the new Phylogeny Explorer in @birdsoftheworld.bsky.social is such a big deal in that regard, and what's in store next for us. eliotmiller.weebly.com/blog/birds-o...

"This is incredible! Long gone are the days that I try to cobble together a Passeriformes phylogenies from countless papers. Thank you for this work!" - I. Robichaud. Introducing the Birds of the World Phylogeny Explorer birdsoftheworld.org/bow/news/phy...

Major thanks to Dr. Eliot Miller 🔽 and Dr. Emily Jane Mctavish who guided the Phylogeny Explorer effort with a team of dedicated people for the last 5 years! Their 2025 PNAS paper set the foundation for the Phylogeny Explorer! www.pnas.org/doi/10.1073/...

Looks like an amazing tool, especially for those of us teaching Ornithology, Evolution, etc. Also, just fun to cruise around and learn about new birds and taxonomic relationships.

Cool tool !!

MAJOR NEWS! We just launched an awesome new tool! The illustrated Birds of the World Phylogeny Explorer lets users trace any bird’s lineage, compare species relationships, and explore major evolutionary milestones with a click of a button. SHARE and EXPLORE! birdsoftheworld.org/bow/news/phy...

Though the Black-eared Catbird of New Guinea and Australia is classified as a bowerbird (Ptilonorhynchidae), males do not construct courtship bowers. Pairs are monogamous as well, further separating this species and others in its genus from other bowerbirds. birdsoftheworld.org/bow/species/bkecat4

Critically endangered, Antioquia Brushfinch is range-restricted to the northern Central Andes in Colombia. In 1971, this small bird was considered extinct but was thankfully rediscovered in 2018. Recent expeditions have found even more viable populations! birdsoftheworld.org/bow/species/antbrf1

Twice a year, Ochre-naped Ground-Tyrants migrate between their nonbreeding range in the Central Andes and their breeding range in the Southern Andes. This relatively long-distance migration takes them as far south as Tierra del Fuego from October to February. birdsoftheworld.org/bow/species/ongtyr1

The White-winged Apalis is a montane specialist, with populations fragmented between the highland forests of Tanzania, Malawi, and Mozambique. To learn about this striking, long-tailed African Warbler, click here: birdsoftheworld.org/bow/species/whwap

Despite its name, the Bat Falcon’s diet is rarely comprised of bats! In Mexico, their diet usually contains less than 14% bat. In Tikal, bats = only 2% of prey taken. Read the updated species account to see what these crepuscular hunters more commonly eat: birdsoftheworld.org/bow/species/batfal1

The Taiwanese "烏面抐桮" and Korean "저어새" names for Black-faced Spoonbill describe the common behavior of foraging flocks, when in unison they sweep their bills from side-to-side underwater searching for fish or shrimp. Click the tiny <i> next to a bird name on BOWbirdsoftheworld.org/bow/species/blfspo1

Among the Cuban endemics is the Red-shouldered Blackbird. Males are glossy black with red epaulets bordered by buff golden. Females are unique in the Agelaius genus in that they are solid black. Learn more about these icterids here: birdsoftheworld.org/bow/species/resbla1

Finally - the glossary of ornithological terms you always needed! Brought to you by the science editors at Birds of the World. Pass it around to the students and profs in your world! birdsoftheworld.org/bow/content/...

Male Cape Weavers weave an intricate kidney-shaped nest over 3-7 days. When a female accepts a male, she lines the interior with fine plant material or feathers. Check out the BOW species account for sequential photos outlining this intimate process. birdsoftheworld.org/bow/species/capwea1

During the breeding season, Great Egrets display as many as 50 ornamental plumes. Prior to 1910, these long feathers were prized in the plume trade, causing steep declines in population. Luckily, organized conservation efforts reduced this trend! Read more: birdsoftheworld.org/bow/species/...

Certain populations of breeding Prairie Falcons employ a swift, contour-hugging flight when chasing their prey. Others prefer to search for prey, most commonly ground squirrels, from perches or as they soar. More on their diverse hunting styles here! birdsoftheworld.org/bow/species/...

Adult Collared Aracaris show striking contrast in shades of black, yellow, and maroon and develop deep serrations to the tomium—the cutting edge of the bill. We’ve expanded the species account with more details on appearance, complete with new multimedia! birdsoftheworld.org/bow/species/...

Happy New Year! Did you know....All contributors who submit at least 1000 complete eBird checklists in 2025 will receive complimentary access to Birds of the World in 2026. But...what is a complete checklist? Have a GREAT birding year! support.ebird.org/en/support/s...

The Eurasian Griffon has long been culturally significant, having been used in ancient flutes and mummified by Egyptians. Though the species has faced great declines, conservation efforts have significantly advanced recovery. More on this majestic bird here! birdsoftheworld.org/bow/species/...

The Hudsonian Whimbrel travels a long way from its breeding grounds in the Arctic to the coastal areas of its nonbreeding range. Some individuals have been recorded to fly around 8,000 km nonstop! Follow us and read more about the amazing journey : birdsoftheworld.org/bow/species/...

Did you know that both male & female Mangrove Yellow Warblers sing and duet? This is one of the many differences supporting its split from the Northern Yellow Warbler. If you’re curious to learn more, read the BOW article about the Mangrove Yellow Warbler here! birdsoftheworld.org/bow/species/...

Thanks to all who Liked and Reposted! We will get there! We hope to get more support to reach our goal in 2026! Hit that follow button! 👆 And have a great weekend!

Hi! We have 1 wish for Christmas! That in '26 we reach 100,000 followers on @bsky.app Please help us by RTing your endorsement! Follow us! Birds of the World is a groundbreaking resource where you can find deep ornithological content on birds, stunning multimedia, and range maps for every bird!

Just another day to get lost in the world of birds! birdsoftheworld.org Check out the surprise me button.

Heads up! It's holiday gift season for many. Treat yourself or a friend to 'Birds of the World' and save 25%. Just go to birdsoftheworld.org and hit SUBSCRIBE. Then use coupon DECEMBER during checkout.

Heads up! It's holiday gift season for many. Treat yourself or a friend to 'Birds of the World' and save 25%. Just go to birdsoftheworld.org and hit SUBSCRIBE. Then use coupon DECEMBER during checkout.

In case you missed this big news! The entire corpus of Birds of the World is now available in Portuguese! We hope Portuguese-speakers worldwide will find this useful! birdsoftheworld.org/bow/news/por...

Feature Friday! Birds of the World adds #Portuguese to growing language offerings #brazil #portugal birdsoftheworld.org/bow/news/por...

Have you signed up to be notified about our FREE online, scholarly seminars given by our network of global experts? Our seminars cover a range of ornithological studies, training, species introspectives, conservation, and more. Sign up here: birdsoftheworld.org/bow/news/sig...