Ajit Pai @AjitPai
For 1st time, “researchers have recorded female Cerulean Warbler calls” more complex than the norm. The “second female, they concluded, was truly singing.” You can hear the various birds’ calls at the link—amazing. H/T @tunkuv @audubonsociety: https://t.co/JGG2NyPRDU — PolitiTweet.org