~taxonomy of swiftlets~
Sunday, June 8th, 2008I’d like to tell you about swifts, a magical bird who turns the European twilight skies into vast aviaries. Some swift facts:
1. Like bats, cave-dwelling swifts navigate by echolocation. They call out and listen for their own echoed answer to find their way in total darkness.
2. Many species glue their nests together with saliva. The [...]

