Yes, compared with what a bird can do. This is what a single bird (vulture) did in to a a small airplane in Brazil recently: https://www.youtube.com/watch?v=ICbWN3XTcig (strong images). This was what another bird did to a large airplane a few years ago also in Brazil: http://g1.globo.com/rio-de-janeiro/noticia/2013/08/aviao-da-... (article in pt-br).