Birds migrate from areas of low or decreasing resources to thosewith high or increasing resources of food and nesting locations.Long distance migratory birds would travel in the mostenergy-efficient way and would migrate only if they can furtheroptimize their energy budget. The ability to maintain a high andconstant body temperature enables birds to exploit a remarkablerange of habitats. Discuss how behavioral and physical adaptationcould help the migratory birds manage their body thermoregulationwith minimal energy consumption. [Total : 20 marks]
