Maybe a disease, but they wouldn't die all at the same time while flying, that's impossible.
I'd vote for the magnetic theory, although I'm not convinced at all. It's just the only believable possibility I'm seeing right now. It did affect fish too, does it make sense ? I'm no expert in animals, but aren't fish supposed to use something in order to migrate and stuff ? What about whales and other big fish too ?
I'd vote for the magnetic theory, although I'm not convinced at all. It's just the only believable possibility I'm seeing right now. It did affect fish too, does it make sense ? I'm no expert in animals, but aren't fish supposed to use something in order to migrate and stuff ? What about whales and other big fish too ?