They also knew that new houses, roads, and office building were destroying the places where frogs live and breed. Part of the cause is still a mystery. Frogs are disappearing from places where humans have not been developing the land, and where there seems to be very little polution. Scientists were watching frogs even before the Minnesota school kids discovered the deformed frogs in the lake near their school. Certain birds, fish, and snakes eat frogs.
Fewer frogs eating bugs means there are more bugs.
It also means that the birds, fish, and snakes that eat frogs have to look around for different kinds of food. Any change in the food chain affects all of the animals, and it is impossible to know exactly how this will end up affecting each one. Here is just one way that frogs fit into the food chain Frog health is linked to environmental health. Frogs live in the water, and breathe through their skin. The scientists who study frogs can discover these problems before they get out of control.