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An example of evolutionary convergence can be seen in the wings of bats (order Chiroptera) and birds (class Aves). Although they have different evolutionary histories, both species have evolved wings for powered flight due to similar environmental pressures and natural selection, such as the need for efficient locomotion to escape predators, hunt for food, and reach distant resources. The wings in both species have developed from their respective ancestors' forelimbs, with birds having elongated arm and hand bones supporting flight feathers and bats having elongated arm and finger bones with a thin membrane (patagium) stretched between them. This example demonstrates how distinct species can independently develop similar adaptations when facing the same challenges.