Birds with only two toes are usually quite rare, as this characteristic is uncommon among birds. The following are some of the main bird species that possess this feature:
Ostriches : Ostriches are the most well-known birds with only two toes. They belong to the order Struthioniformes and are the largest birds in the world, mainly distributed in Africa.
Several types of cranes : Some crane species also have only two toes, such as the red-crowned crane and the demoiselle crane. Their toes are of moderate length, which is suitable for walking and foraging in wetland environments.
Some woodpeckers : Some woodpeckers also have only two toes, such as the golden-backed woodpecker. Their toe structure is adapted for climbing trees and foraging for insects.
These birds typically possess characteristics adapted to specific living environments, such as the speed and strength of ostriches, the elegance of cranes and their ability to adapt to wetland environments, and the climbing and foraging skills of woodpeckers. Their two-toed structure also plays a role in their survival and reproduction in particular environments.
