Redwing black bird call

It has been a busy day today this morning did some errands around the apartment. around lunch needed to go to the bank and along the way got this red wing blackbird making its distinctive call. when they do they get the whole body into it. When I came back went to feed the other red wing that lands in my hand but ran out of peanuts to feed the cardinal that followed me around the park see extra. I did try some seeds that the chickadees eat but it is not the same as peanuts.