In fact two groups of birds also feed their young on milk. One of them is pigeon. Name the other. 7 Lizards can grow up to a length of 3 meters and prey on animals as large as deer and wild pigs. 8 Eagles can glide in the sky for a long time without even moving their wings.
Swifts are the fastest flying birds.
Our eyes are in front of our head. 10 Sweating helps cooling of the body. When we sweat, our skin secretes a salty colorless fluid. When this sweat evaporates, it cools the body. But there is a mammal, which sweats blood.