A question often asked – do bird feeders help or hurt birds? A thoughtful analysis from Cornell:

Cornell All About Birds

By Emma Greig

“…There are some clear benefits of feed­ing birds. We know that some regular feeder visitors, such as Northern Cardi­nals, are doing very well, because their populations are growing and ranges expanding. But supplementary feeding has also been associated with negative impacts such as disease transmission, deaths from window strikes (when birds fly away from a feeder and into a house), and increased predation pressures (such as Cooper’s Hawks feeding themselves by feasting on feeder birds). Can we rec­oncile these disparate consequences of bird feeding and determine if feeding is actually harmful on a broad scale?”

Read more here: https://www.allaboutbirds.org/news/analysis-do-bird-feeders-help-or-hurt-birds/