'Empty nester' parent birds use recruitment calls to extend offspring care
By studying a habituated population of pied babblers (Turdoides bicolor) in the Kalahari Desert, researchers have discovered a surprising new way in which parent birds can extend the period of their care of offspring. The findings are reported by Andrew Radford of the University of Cambridge and Amanda Ridley of the University of Cape Town and appear in the September 5th issue of Current Biology,...