Analogous Structures

Duck

Mosquito

     In the top picture, a duck is shown. Whereas, the bottom  picture shows a mosquito. The wings of the duck and mosquito are examples of analogous structures. Analogous structures are those structures that strike similarity in appearance, function, or arrangement. However, those pertaining animals have evolved independent of the other and have contrasting ancestors. The duck and mosquito both have wings which are structurally alike and the same goes for their purpose: flight. That being said, the duck and mosquito are different species and do not retain a common ancestor.