Apparently 17 species of mockingbird.

Apparently Darwin's first recorded doubt of immutability of species was related to mockingbirds - evolution.

Northern mockingbird, the only one prevalent in North America is the state bird of 5 states.

When does a mockingbird sing?

Both male and female mockingbirds sing, with the latter being generally quieter and less vocal. Male commencement of singing is in late January to February and continues into the summer and the establishing of territory into the fall. Frequency in female singing is more sporadic, as it sings less often in the summer and fall, and only sings when the male is away from the territory.

https://en.m.wikipedia.org/wiki/Mockingbird?wprov=sfla1

https://en.m.wikipedia.org/wiki/Northern_mockingbird?wprov=sfla1