Penguins have thick, webbed feet that are wide and strong. They use their strong feet for walking and jumping on the land. In the water they use their feet for braking and steering as they swim and dive. They also have long tails that help them to sit up on land and acts as a rudder when they are swimming. Flying birds have long, thin feet that let them perch on branches.
Penguins have a strong and often long beaks.
The beak is used to do many things. The beak is used for catching food. The edges of the beak are sharp and have rough spines in the inside to help them hold onto the slippery fish they catch under water. The beak is strong and is used to carry materials for nest building. Penguins use their beaks for feeding their young.