Sri Lankan axis deer are active primarily during early morning and again during the evening, but they are commonly observed near waterholes anytime. The Sri Lankan axis deer eats primarily grasses, but it also eats fallen fruits and leaves. The Sri Lankan axis deer graze closely with langur, peacock, wild buffalo, and sambar deer. They usually live in groups of between 10 and 60 animals, though herds may include up to 100 animals.
Axis deer are important prey for the Sri Lankan leopard. It is also prey for sloth bears, jackals, and crocodiles.
