 Experimental evidence for helping and hindering by previous offspring in the cooperative-breeding Seychelles warbler Acrocephalus sechellensis by Jan Komdeur

Behavioral Ecology and Sociobiology34,175–186 (1994), DOI10.1007/BF00167742. Author-institution abstract and original PDF pure.rug.nl/ws/portalfiles/portal/3287646/1994BehavEcolSociobiolKomdeur.pdf : helper removals with ecological controls; one versus multiple alloparents and context-dependent outcomes.