... in heat tolerance and evaporative cooling capacity. Our data on thermoregulation at environmental temperatures above T b in five Australian passerines varying ∼7-fold in M b support the notion that evaporative cooling in the Passeriformes is generally less efficient than is the case in orders...

... of a relatively low body temperature under extreme heat conditions. Body temperature Columbiformes Cutaneous evaporative water loss Hyperthermia Passeriformes Respiratory evaporative water loss The defense of a body temperature ( T b ) set point below environmental temperature is possible only...

... © 2000 by Company of Biologists 2000 doubly labeled water field metabolic rate seasonality time budget standard operative temperature Passeriformes water flux verdin Auriparus flaviceps The lives of most temperate-latitude birds are organized on an annual cycle...