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Animals In Print
The On-Line Newsletter

From 28 July 2009 Issue

Help Save Frogs from a Deadly Poison
Endosulfan’s Deadly Impact

Tell EPA to Take Action

Northern Leopard Frog
Pictures from

Endosulfan is lethal to threatened northern leopard frogs and also dangerous for farm workers and others who are exposed to it.

Endosulfan’s Deadly Impact

The northern leopard frog may be smaller than a cup of tea, but this tiny amphibian is in big trouble. Once prevalent throughout North America, threatened northern leopard frogs are put at an even greater risk by endosulfan -- a deadly pesticide that’s been banned in at least sixty countries, but not in the U.S.

Endosulfan is a neurotoxic organochlorine pesticide -- similar to DDT and other insecticides that have been banned in the U.S. for decades. It has a wide range of environmental and health risks to birds and other wildlife, but threatened northern leopard frogs are especially vulnerable to its effects.

In one recent scientific study, a low dose of endosulfan was enough to kill 84% of leopard frog tadpoles that came in contact with it. According to the study’s lead author, Rick Relyea, “Endosulfan appears to be about 1,000-times more lethal to amphibians than other pesticides that we have examined.” [1]

Endosulfan is banned across the European Union and in many other countries. However, the companies that make this deadly poison have managed to keep their dangerous product on American shelves.

It is time for U.S. authorities to put human health and the safety of our environment ahead of profits for the chemical companies! Please take action now.

Frogs aren’t the only ones threatened by endosulfan’s continued use. This deadly poison also poses human health risks -- particularly for the farm workers who apply the poison to tomatoes, tobacco, apples and other crops.

Endosulfan can cause many adverse health effects. At low doses, endosulfan exposure has been linked to hormone system disruption, autism, Parkinson’s disease and other birth defects. At higher levels, endosulfan can cause headaches, vomiting, convulsions and -- in extreme cases -- unconsciousness and even death.

Endosulfan's risks to our health and our wildlife are unacceptable. Please urge the EPA to get endosulfan off our shelves today.

Thanks in advance for making a difference on this vital issue. With your help, we can send a loud, strong message to the EPA that our frogs, our health and our environment are worth protecting.

Caroline Kennedy
Senior Director of Field Conservation
Defenders of Wildlife


Defenders of Wildlife is a national, nonprofit membership organization dedicated to the protection of all native wild animals and plants in their natural communities.

Defenders of Wildlife can be contacted at:
1130 17th Street, NW
Washington, DC 20036.

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Please send comments and submittals to the Editor: Linda Beane [email protected]

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