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A Guide to Some Possible Bird Species Splits in Costa Rica

10,000 Birds

These and several other species might end up being armchair ticks if and when we take a closer look at their evolutionary history. Taxa that could end up being split into one species occurring north of the Isthmus of Tehuantepec, and one south of the isthmus. (2). Bird species that require further research.

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How to Help Cerulean Warblers, Other Migrant Species, and Resident Birds in Costa Rica

10,000 Birds

A wonderful variety of bird species are waiting to be seen and among them are many a birder’s favorite avian group, the wood-warblers. Among the most desired bird species during May migration, brightly colored, beautiful and boldly patterned, how can a birder not get hooked on spring warblers? Great Green Macaw!

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The “Rufa” Red Knot is now protected under the Endangered Species Act

10,000 Birds

Fish and Wildlife Service has listed the “Rufa” population of Red Knot ( Calidris canutus rufa ) as a threatened species under the Endangered Species Act (ESA). The other sub-species, Calidris canutus roselaari , migrates along the Pacific Coast and breeds in Alaska and the Wrangel Island in Russia.

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Not enough Woodpeckers

10,000 Birds

Or would be, had I encountered more of them – so far, I have seen only a very small share of the approximately 233 woodpecker species, and got decent photos of an even smaller number – not much more than 10% of all of them. So, writing a post about them is easy.

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How Birds Evolve: What Science Reveals about Their Origin, Lives, and Diversity: A Book Review by a Non-Science Person

10,000 Birds

He also believes that we are living in an era of incredible scientific research, one in which new genetic technology and findings from diverse scientific disciplines have turned assumptions upside down, opened up new lines of thought, and provided answers, or at least probable answers, to many of our questions about why birds do the things they do.

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Birds of Chile – A Photo Guide

10,000 Birds

Guiding aside, Howell is a research associate at the California Academy of Sciences and the author of many books, including Petrels, Albatrosses, and Storm-Petrels of North America (Princeton). We have tended to a liberal (= realistic) direction when recognising species.” Well, this is one interesting claim.

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The origins of tanagers, warblers, and sparrows are coming into focus

10,000 Birds

A new paper out this month attempts to paint the most comprehensive picture yet of the origins and diversification of the American sparrows, wood-warblers, blackbirds, cardinals, tanagers, and their kin, an enormous group of birds more than 800 species strong. The paper is by leading researchers F. Keith Barker, Kevin J.

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