Abstract
Long-billed vulture is warm-blooded and they regulate body temperature by solar radiation. Thermoregulatory behaviour plays an important role for organism survival and its fitness. It also plays a major role in removal of ectozoons, cleaning of body and feathers, elimination of sand particles, wing flexibility and is also helpful in long distance flight. Maximum thermoregulation time recorded in winter were (680±95.65) and minimum were (516.07 ±68.66) seconds in summer in per day. Maximum thermoregulation time’s record in winter was due to low environmental temperature, high humidity and low wind velocity. In winter maximum average temperature was (27.12±2.88°C) and minimum was (8.63±3.03°C), while thermoregulation time minimum recorded in summer due to high environmental temperature. In summer season maximum average temperature was recorded (39.34± 2.10°C) and minimum was (23.08±4.49°C). Thermoregulation is influenced by various ecological parameters like- temperature, rain, sunshine period, wind velocity and cloudy weather. Thermoregulatory times reduced when environmental temperature increased. In summer long billed vulture protect nestling from direct sunlight.
Highlights
Sun-bathing or basking is a behaviour seen in birds for many kinds of reasons (Kennedy, 1969)
The thermoregulatory behaviour is performed by many avian species and reported in more than 170 species of birds belonging to 48 families (Kennedy, 1969)
Thermoregulatory behaviour of long-billed vultures is generally seen in morning hours and warmer time of day in cloudy and winter season
Summary
Sunbathing is used to maintain body temperature, and plays a vital role in maintaining flight muscle, healthy wing, able to fly longer distance , aerial flight and searching food and water for its survival. It plays a key role in survival of warm-blooded animals like reptiles, birds and other organisms living in dry and cold environment. Study will provide details observation of environmental factors liketemperature, humidity, wind velocity and season on thermoregulation behaviour of long billed vulture
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