On the Tibetan Plateau White-collared Blackbirds can breed twice a year. The first breeding attempt results in small clutches where a few nestlings fledge in high body condition. Contrasting with the second attempt where larger clutches result in more chicks fledgling but these are in lower body condition. These differences are thought to be driven by parental feeding behaviour and seasonal variation in food availability. Field studies indicated that females, but not males, exhibit different nest defence behaviours that can be used to classify them into bold and shy personalities. Bold females had higher nest success compared to shy ones.[2] White-collared Blackbirds feed their chicks plant material, especially berries, and invertebrates such as arthropods and annelids.[3]
^Fan, L.Q.; Chen, G.L.; Da, X.W.; Luo, J.J.; Xian, L.L.; Ren, Q.M.; Xie, Y.Y.; Du, B. (2017). "Seasonal variation in food availability influences the breeding strategy of White-collared Blackbirds Turdus albocinctus on the Tibetan Plateau". Ibis. 159 (4): 873–882. doi:10.1111/ibi.12506.