Dawn Sneaks: Old birds sing early, cuckold sleepyheads Susan Milius Among European birds called blue tits, the early bird gets more than a worm. Older males start singing some 5 or 6 minutes earlier in the dawn chorus and attract more of the promiscuous females than younger males do, researchers report in an upcoming issue of Animal Behaviour. SLY SONGS. Among blue tits, males' dawn chorus may be a networking system for encounters with wandering females. K. Delhey In Europe, the springtime dawn chorus includes the voices of male blue tits (Cyanistes caeruleus), colorful little cousins of chickadees. Those males...