Fig. 1From: Russet Sparrows spot alien chicks from their nestsChick rejection behavior in Russet Sparrows. a Russet Sparrow nest with two bunting chicks (indicated by black arrows) and 2 Russet Sparrow chicks (between the two bunting chicks). b Russet Sparrow parents returned to the nest and started to hold a bunting chick in its beak. c Russet Sparrow parents ejected the bunting chickBack to article page