Grass seeds form the bulk of its diet.

The bulk of their diet is green vegetation, especially in the summer.

Mammals and reptiles make up their bulk of their diet.

Seeds make up the bulk of its diet.

Fish form the bulk of its diet, though amphibians, invertebrates and plant material are sometimes eaten as well.

However, fecal samples have shown that aquatic algae form the bulk of their diet.

Insects form the bulk of its diet during the breeding season but fruit and seeds are important in winter.

The juniper fruit appear to form the bulk of its diet.

The fruits of these plants appear to form the bulk of its diet.

Normally, though, the bulk of its diet consists of fish and frogs.