@Algot Higher mammals, some birds, and maybe a couple of reptiles are intelligent enough to recognize patterns. Great Apes of various kinds are, if not wholly sentient, at least semi or near/pre-sentient.
As for Seti, I hav no answer for that. Chances are anyone who could communicate across vast interstellar instances doen't give a hot shit about a type-0 civvy on a crapball planet.
@Surasanji
I am reminded of a book/series by C.J.Cherrh: "Foreigner" which has alien/human communication as a central feature.