The Crocodile and Recreation Park in Ayer Keroh has lost more than 50 crocodiles due to visitors littering the enclosures with non-degradable trash.

From the New Straits Times:

"In most cases, post-mortems revealed that the reptiles had died of severe lung inflammation, which was caused by consumption of plastic bags," he told the New Straits Times at the park yesterday.

Amran said in several cases, plastic bags were found in the stomach of dead crocodiles.

"We have come across a lot of rubbish being thrown by visitors... food containers, water bottles, plastic bags, clothing, slippers and even diapers. The more visitors we have, the more rubbish we would collect in the pools at the end of the day.

"From our experience, visitors would usually throw things into the pool to make the crocodiles move as they lie motionless."

He said visitors continued to throw litter at the reptiles despite the presence of signboards warning them not to do so.

This is an issue world-wide and species-wide. In my travels I have seen a variety of signs trying to discourage this behavior. If you happen to be somewhere and see someone preparing to do this, stand up and stop them.