Natural history of Trinidad and Tobago giant leatherback sea turtle ("Dermochelys coriacea"), the hawksbill turtle ("Eretmochelys imbricata"), the loggerhead turtle ("Caretta caretta"), the olive ridley turtle ("Lepidochelys olivacea") and the green sea turtle ("Chelonia mydas") are marine species that either nest on the islands' beaches or frequent their coastal waters. The land dwelling yellow-footed tortoise ("Geochelone denticulata") or Morrocoy as it is locally known is threatened by high levels of poaching in Trinidad. The odd mata-mata turtle ("Chelus fimbriata") is known as a waif (and is possibly a rare inhabitant) of the Nariva Swamp and other southern and eastern coastal river systems in Trinidad. The wood-turtle
Loggerhead shrike be energetically stressed and underweight. Insects are consumed in mid-flight, but vertebrates usually require more handling time and therefore more energy. Due to the shrike's small size in proportion to the size of its prey, it must rely on specialized adaptations to facilitate its hunting. The powerful, hooked beak of the loggerhead shrike allows it to sever the neck of a small vertebrate. Larger prey are subjected to impaling, in which they are pushed down into a sharp projection, such as a thorn or barbed wire. The bird can then tear off flesh by using the projection as an anchor.