>>4239295>textfag discovers somespecies are more used to human presence than othersRaptors, tyrannids, rallidae, scolopacidae, and rhinocryptidae are some orders and families which require some knowledge of behavior in order to take good photos. You won't stumble into them by walking like a loud shit while screeching that you've got birdfeed. Other birds (such as flamingos) will fly away even when you are only 90m away.
The result will often be you interrupting a bird's feeding activities. Sometimes it'll amount to nothing, but migratory species have low survival rates (around 50%) during migratory periods, which means you're making them spend extra energy on relocating to a new feeding spot.