What are birds eating in Philadelphia county? This can be migrants, breeding birds, or wintering birds. And they can be eating any food found in the wild (so no feeders) - caterpillars, other insects, spiders, fish, or berries. Even flowers that hummingbirds nectar on will be allowed. The birds themselves should be a separate observation and can be Linked using the 'Linked Observation' field. Also, use the 'Interaction->' fields like 'Interaction->Preyed upon by' and the name of the bird. less ↑