Variation in kin bias over time in a group of Tibetan macaques at Huangshan, China
Female preferences for dorsal fin and body size in Xiphophorus helleri
Behavioural colour change in the hermit crab Pagurus bernhardus
A visual audience effect in a cavefish
Nest defence and egg rejection in the house sparrow (Passer domesticus) as protection against conspecific brood parasitism
Female white-handed gibbons (Hylobates lar) lead group movements and have priority of access to food resources
Intragroup aggression, fission–fusion dynamics and feeding competition in spider monkeys