src: Although harder to identify in the fossil record, similarities in the digestive and cardiovascular systems, as well as behavioral similarities and the shared presence of feathers, also link birds with dinosaurs.
tgt: Ainda que difícil de identificar no registro fóssil, as similaridades nos sistemas digestivo e cardiovascular, assim como similaridades comportamentais e a presença comum de penas, também ligam as aves aos dinossauros.