Research Sparrows Species 
10,000 Birds
MAY 10, 2015
I therefore decided to counter this month’s heinous wood-warbler attack on my retina by choosing the good old trusty House Sparrow as the topic of my May post. The last aspect is something I will elaborate on further below, but not before showing off a prime fine male House Sparrow, unethically photographed at its nest site.
10,000 Birds
MAY 28, 2022
Today, along with teams in a few other parts of Costa Rica and elsewhere, I will be birding for a cause, watching birds to help one that only lives in Costa Rica, the Cabanis’s Ground-Sparrow. Around the size of a Song Sparrow or Chaffinch , maybe a bit bigger, this mini towhee forages near the ground in dense scrubby vegetation.
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10,000 Birds
JANUARY 25, 2015
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. We now know a lot more about who is a tanager vs. a sparrow vs. a cardinal.
10,000 Birds
MARCH 21, 2015
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). Two subspecies of the same species that differ within Costa Rica. (4).
10,000 Birds
MARCH 23, 2014
Big news about a small bird broke earlier this month when bird researchers from several nations announced that the species formerly known as Spotted Wren-Babbler ( Spelaeornis formosus ) — a tiny, secretive bird of montane forests from the eastern Himalayas to southeast China — is not a Spelaeornis wren-babbler at all.
10,000 Birds
JULY 24, 2014
The obvious choice was the Mallard , that plucky familiar northern hemisphere species that is the father of the even more familiar domesticated duck. In fact, as the species was quickly identified as as creating hybrids with Grey Ducks, the opinion was by the 1920s that the species shouldn’t be released further.
10,000 Birds
JULY 13, 2014
It’s mid-July, which among other things means that those of us in North America are starting to check local mudflats for returning shorebird migrants and waiting impatiently for the AOU to hurry up and create five species from the Clapper-King rail complex (the reasons for which we covered last year ). Elephant birds and their kiwi kin.
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