I'm not joking about the bird shrieking when I was within arm's reach of these camera batteries. However, judging by the urgency of the shrieks and squats from the bird(s), the batteries must pose enough of a hazard that yes, even the birds are being proactive.
I'm not sure how to make tourists understand that leaving camera batteries on the shoreline with endangered species is not appropriate disposal. Even if a trash can is still not proper battery disposal, it is better than leaving the batteries to corrode and harm sealife. I can imagine that the battery acid can main and blind and burn the endangered Sea turtles.