Great kiskadee - Arraial do Cabo, RJ Brazil

I'd say it's not a great kiskadee, but possibly a cattle tyrant (suiriri-cavaleiro - (Machetornis rixosa)).

@Enzo
I honestly couldn't differ female kiskadeed and cattle tyrants very well. I remember having searched at the time and concluded it mas more like a female Pitangus sulphuratus, but I'm gonna check in my bird classification guide one more time to be sure.