Together with pratincoles, form the family Glareolidae (17 species). These slender, plover-like ground nesters live in open areas in tropical parts of the Old World, and sometimes cool their eggs or young by partially burying them in sand or by bringing water to the nest in their breast feathers. Found on https://academy.allaboutbirds.org/bird-academys-a-to-z-glossary-of-bird-ter