We have a flock of Rosy Breasted Finches that probably number 200 that raid our bird feeders. They come in as a flock and in a minute they will empty two bird feeders and a suet feeder.
Because of their sheer numbers they drive all the other birds off and if we fail to notice them we are constantly filling the bird feeders.
Because of their large numbers they are hard to drive off and will swarm the feeders as I'm trying to take them down. We take the feeders down when we see them flock in so the other birds can feed too. In many ways they remind me of some groups of people who claim to have a cause. Impervious to anyone or anything around them to get their way through sheer numbers.