Novel objects such as magazines, pet toys, buckets, etc. also provide the animals with stimulating situations. Social interactions in captivity are frequently more intense than they would be in the wild because the animals are closer together and because there are less alternatives to social interaction. By providing the animals with alternative activities some social b behaviors, such as aggression, can frequently be reduced, thus lowering the stress of captivity and, in some cases, increasing the chances of reproduction. The chimpanzees use sticks as tools to get this. Vollum Aviary Enrichment Meal worms and crickets placed in clear plastic tubes holes are placed on the ground for the birds.
Different birds use different techniques to get the insects.
Hornbills roll the tube along the ground until the insects fall out, and egrets pick them out with their long slim bill.