Which among the following have a 'mixed heart'?
Mixed heart means the heart in which the oxygenated and the deoxygenated blood is mixed. Reptiles and amphibians have mixed heart.
Name the bird that migrates from the north pole to the south pole and back?
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Bees have _____ pairs of wings?
Which is the only bird that can fly backwards?
Which living bird lays the world's largest egg?
What is the fastest of all the birds?
Swift is the fastest among all the birds in India