1:- The number of existing penguin species is debated but thought to be between 17 and 20.
2:- Penguins are a group of aquatic birds and they have become highly adapted for life in the water.
3:- Their wings have become flippers meaning that they are flightless in the air but great swimmers and highly agile in water. Their swimming looks very similar to bird’s flight in the air.
4:- When under water a layer of air is preserved within the smooth plumage, ensuring buoyancy. The air layer also helps insulate the birds in cold waters.