LifeYoung seabird couples get 'divorced' with little immediate benefit Thick-billed murres normally mate for life, but young couples are more likely to break up, despite seeing no benefit to mating success the next year News
LifeNightingales match the pitch of their rivals in singing duels Male nightingales respond to each other’s songs by whistling back at the same pitch when competing for territory, and they even copy the pitch of artificial whistle sounds News