We don’t know if bird-window collisions affect bird population sizes. If populations are resource limited, preventing collision deaths might not increase population size — it might just shift which individuals die and how they die. If populations do increase, though, this creates cascading effects on prey species (primarily insects); scavengers who feed on collision victims; other animals who compete with birds for space, food, or other resources; and broader ecosystem dynamics.
I think replacing standard with bird-safe glass may impact arthropods much more than birds.
Hi Mal.
I think replacing standard with bird-safe glass may impact arthropods much more than birds.