If you are concerned about the amount of food a red-winged blackbird flock eats when it descends on your yard, you have few choices. You can continue your feeding regime and just take the opportunity to study the birds as they feed. Since redwings often fly about in the company of other “black” birds” you may spot rusty, or Brewer’s blackbirds mixed in with the redwings. You can also use the opportunity to study the feeding behavior of red-winged blackbirds.