Robins may be the only bird that dont require a mate to reproduce. (Not the European Robin, which is a different bird entirely.)
Researchers have found that female north anerican robins will "self fertilise" about 12% of their eggs.
This means one in every eight female robins is a clone of her mother.
The Parthenogenically produced offspring do not have a detectable increase of self-fertilised eggs, however, and it is thought that if there were- the advantage would have eliminated the necessity for male robins. It is thought that retaining sexual recombination balances against the fast-repopulation advantage of pathenogenesis.
Researchers want to look at other birds for parthenogenesis, and are rushing to develop paternity tests for related species.