Water Pollution
Gray tree frogs rely on clean water sources for reproduction. They lay their eggs in marshes, ponds, puddles, swamps and bogs between March and October. Polluted water sources threaten the gray tree frog by harming their eggs. In order to survive, the gray tree frog needs cleans water. Poor water qualities that threaten their reproductive cycle comes from runoff from pesticides and waste water, illegal dumping and the leaching of toxic chemicals.
Acid Rain
Amphibians, including the gray tree frog, are very sensitive to acidic levels in the soil. Therefore, acid rain, which increases soil acidity, poses a great threat to the gray tree frog. Acid rain is a product of increased levels of carbon dioxide in the atmosphere. Acid rain also affects acidity levels of the water which gray tree frogs rely on to house their eggs.
Development
Habitat loss and degradation is a side effect of development that threatens the gray tree frog. Gray tree frogs need both wetlands and forest to survive. Therefore, harm to one of these environments can threaten their survival and life cycle. In the forest, gray tree frogs make their homes in trees, holes, beneath bark, leaves and tree roots, as well as the inside of rotten logs. Gray tree frogs lose their habitats due to clear cutting, urbanization, agriculture and the building of roads.
Mosquito Fish
Mosquito fish are often added to ponds to reduce mosquito populations. When released into the pond environment, mosquito fish also prey on the eggs and larvae of the grey tree frog, thereby threatening gray tree frog's reproduction cycles and reducing the population.