The Aquipos toucan is able to use its long beak to reach inside apertures in a tree's bark and feed on the insects that dwell within and that are the toucan's main food source. Several noted ornithologists have speculated that because the toucan's beak is curved in a manner similar to the openings in the bark, the beak evolved so that the toucan can best take advantage of the insects lying deep inside.
The Aquipos toucan is also able to use its beak to break bark, thereby accessing insects that dwell in the trunk argues most strongly against the ornithologists' speculation.