Toucan - barbets may also feed their chicks small numbers of vertebrates .
Insects are more common in the diet of nestlings , and compose 40 % of the food brought to the nest in toucan - barbets .
Toucan - barbets may also feed toucan - barbets ' chicks small numbers of vertebrates .
Insects are more common in the diet of nestlings , and compose 40 % of the food brought to the nest in toucan - barbets .