I know that it is a tragedy when a person wants to check Twitter on her phone, and the service sucks and -- aaaaahhhh -- now she is bored. Bored, bored, bored, and AT&T is the worst, and why didn't you wait for the Verizon iPhone? Luckily for bored humans, there are 84,000 communications towers in North America intended to forestall this type of angst. Unluckily for birds, these 84,000 communications towers in North America often kill the birds as they are migrating each year.
The University of Southern California put a number on this massacre and it is large: 7 million bird deaths each year.