I noticed that several robins were still here in southeast Iowa only a few weeks ago, during a very heavy snow. They ate all the crab apple berrys off the tree in our yard and also one at work. I have not seen any robins for the last two weeks. Did they all die from hunger? Will they all die if they did not leave for the south?
Also while on the subject of robins, since they eat fruit and worms are they considered omnivors? Are birds which eat (mostly) grains herbavors? Maybe these words are only used with mammals(?).