Bird migration is not limited to birds that can fly. Most species of penguin (Spheniscidae) migrate <answer>by swimming</answer>. These routes can cover over 1,000 km (620 mi). Dusky grouse Dendragapus obscurus perform altitudinal migration mostly by walking. Emus Dromaius novaehollandiae in Australia have been observed to undertake long-distance movements on foot during droughts.
How do penguins migrate?
by swimming