Innovative flavoring behavior in Goffin's cockatoos

Area of Science:

• Animal Behavior
• Cognitive Ecology
• Avian Cognition

Background:

• Dunking behavior is a foraging innovation where animals dip food in a medium before eating.
• Previously suggested functions include soaking, cleaning, flavoring, drowning, and transporting liquid.
• Most observations of dunking are anecdotal, hindering functional inference.

Purpose of the Study:

• To experimentally investigate novel food preparation behavior in Goffin's cockatoos (Cacatua goffiniana).
• To determine if cockatoos use soy yogurt for food flavoring, similar to observations in Japanese macaques.
• To assess preferences for different yogurt flavors and yogurt-food combinations.

Main Methods:

• An experimental setup tested 18 Goffin's cockatoos with two types of soy yogurt and water.
• Food items were offered with yogurt and water to observe dunking behavior.
• A separate food preference task evaluated preferences for yogurt-food combinations versus yogurt alone.

Main Results:

• Nine out of 18 cockatoos dunked food in soy yogurt.
• Cockatoos showed a preference for blueberry-flavored yogurt over neutral yogurt, not solely based on color.
• A significant preference was observed for the combination of yogurt and noodles over yogurt alone.

Conclusions:

• Goffin's cockatoos exhibit innovative food flavoring behavior using soy yogurt.
• This behavior suggests a second instance of food preparation innovation in this species.
• Provides experimental evidence for innovative food flavoring outside the primate lineage, expanding understanding of animal food preparation.