10,000 Birds

MARCH 30, 2015

(That impressive number is a testament to the exponential advances in DNA-sequencing technology, but the researchers are quick to note it’s still less than 1% of the total genome.). They found no DNA variation that distinguishes Hoary Redpolls from Common Redpolls.

Species 212

Species Switzerland Groups Europe 212

10,000 Birds

MAY 10, 2015

You see, it clearly resembles a hybrid between the Spanish and the House Sparrow, and an ancient hybrid event was long suspected to be the source of its existence – with recent research indicating that apparently this isn’t the case after all. Winter plumage makes things a bit more difficult, but the difference is rather obvious.

Sparrows 215

Sparrows Italy Asia Austria 215

10,000 Birds

MARCH 3, 2020

The source of this ranking, BirdLife International, lists Bolivia as currently having 1,439 bird species, including 18 breeding endemics. But, the numbers are quite large, and the birds organized in groupings that, for the most part, make it an easy process to figure out which Antwren (or Woodcreeper or Seedeater) is which.

Bolivia 172

Bolivia Birds Brazil Switzerland 172