Main Characteristics of Penguins

There are 18 species of penguins.
The emperor penguin is the largest penguin. It grows to 43-51 inches (110-130 cm) tall and weighs 100 pounds (45 kg).
The smallest penguin is the little penguin. It grows to 13-16 inches (35-40 cm) tall and weighs 2 pounds (1 kg).
The fastest penguin is the gentoo penguin. It swims up to 22 mph (36 km/h).
Penguins live exclusively in the southern hemisphere.
Their habitat is the open sea. They only go on land to breed.
Penguins can't fly, but they're excellent swimmers.
Penguins are carnivores. They feed mainly on fish.

Penguin Family Tree