EntityQ641692· pop 20· linked from 107 articleskeelSign in to savebird anatomyConnectionsfinEntitybird anatomyEntityconvergent evolutionEntitypenguinEntityribEntityleverEntitydigitEntityornithologyEntityTetrapodaEntityActinopterygiiEntitywingEntitysternumEntitySarcopterygiiEntitypterosaurEntityungulateEntityAfrican PenguinEntityhomologyEntitylimbEntityflightless birdEntitywingspanEntityCategoriesBird anatomy