
Birds lack sweat glands, so they pant like dogs instead of sweat like people. By opening its mouth a bird increases the airflow and causes more moisture to evaporate and cool their body.
When the temperature is in the 90's, a bird’s body may start to overheat. Birds give off excess body heat through their unfeathered legs and can ruffle their body feathers so hot air close to the skin can escape. A bird will also pant, travel less, find a shady spot, or seek water to reduce its body temperature.
In this heat a refreshing dip in a birdbath is very effective in lowering their body temperature and rehydrating their body to beat the heat.
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Bird Basics
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