CZ:Ref:DOI:10.1016/j.anbehav.2007.04.031

Morand-Ferron, J.; D. Sol & L. Lefebvre (2007), "Food stealing in birds: brain or brawn?", Animal Behaviour 74 (6): 1725–1734, DOI:10.1016/j.anbehav.2007.04.031 ^[e]

Provides a literature review based on "856 reports of interspecific kleptoparasitism by 197 species from 33 avian families", concluding that this behaviour correlates with brain size (and hence cognition), habitat and diet but not with body size or aggression.