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What is convergent evolution in birds?

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Cape longclaw (Macronyx capensis) standing on dry grass, showing its bright orange throat and yellow underparts with brown-streaked upperparts. — Longclaw Cape longclaw, or orange-throated longclaw (*Macronyx capensis*).

Convergent evolution is the independent development of similar traits or features in unrelated or distantly related species that typically occupy similar environments or ecological niches. This means that species that are not closely related can evolve similar adaptations because they face similar environmental challenges or fill similar ecological roles.12

For example, longclaws, which are African birds, share surprising similarities with meadowlarks, which are New World birds. Both are the same size and shape, have streaked brown backs, bright yellow underparts, a black V on the neck, and white tail feathers. This resemblance is a case of convergent evolution, where similar adaptations arise in unrelated species due to similar ecological roles.2

Another example can be seen in falconiforms, where convergent evolution has led to similar traits among different species. For instance, in Australia, large kites have evolved to fill the ecological niche occupied by buzzards in other parts of the world. Similarly, the shark (a fish) and the dolphin (a mammal) exhibit similar external morphology due to convergence, as both have adapted to aquatic life independently.34