Medium-sized kingfisher of tropical lowlands; fairly common in eastern Mexico, rare in western Mexico. Found singly or in pairs, along rivers and at the edges of ponds and lakes, often perched on wires or bare snags. Mainly flies low over the water. Size similar to Belted Kingfisher, but black bill much more massive and crest more tufted. Also differs from Belted in its dark oily-green head and upperparts. Green Kingfisher is much smaller with bold white spots and bars on the wings.