Brood parasitism: #Cowbird eggs damage host eggs during laying from elevated positions

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Thick eggshells of brood parasitic cowbirds protect their eggs and damage host eggs during laying. López et al. (2018) Behavioral Ecology. doi:10.1093/beheco/ary045. Paper: https://doi.org/10.1093/beheco/ary045 Videos and photos: Analía V. López (Argentina) Henrique Domingos (Brasil) Kevin Ellison (USA) Brian D. Peer…