Yeah, I’ve been neglecting this.
Clearly a black bird. It has a thin, pointed bill, a dark eye, and is a smooth black without any glossy color. Of the blackbirds, Rusty (and the very unlikely Brewer’s) has a pale eye, Common Grackle is much bulkier, glossier, and with a bigger bill, and Brown-headed Cowbird would have a brown head and thicker bill. That leaves Red-winged Blackbird, which this is.
At the time, it was one of the first ones to arrive for the spring. Now they’re everywhere.