Do you know why swiflets like to play above the surface of water?

Do you know why swiflets like to play above water surface during early morning?

1, Most of the swiflets hatched eggs at night, they have to soak their body to cool their body.
2. Eggs must cool with water intermittently so as not to stick to the body of the mother bird.
3. Drink water
4. Catch some flies on the water surface.


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