Most plants need to be pollinated by birds, bees, bats and other animals and insects to reproduce, and scientists say a decline in pollinators may spell trouble for crops.

Honeybees and bumblebees have been infected by the introduction of a parasite, while destruction of cave roosts has led to a decline in the bat population.

[Read](http://www.msnbc.msn.com/id/15316711/ “Read the Story”) (AP via MSNBC)