The Probert Encyclopaedia of Nature

FISSIROSTRES

The Fissirostres are the wide-gaped tribe of passerine birds. They are characterized by a broad bill, more or less flattened horizontally, and often hooked at the tip, with the mouth very deeply cleft. The upper mandible is not notched. The feet are small and feeble. Most of the species feed on insects, which they catch on the wing, but at least one genus eats fish. The species are mostly natives of tropical regions, visiting temperate regions as migratory visitors.
Research Fissirostres