Dallas - A conservation group has sued Texas environmental regulators over a record die-off of endangered whooping cranes.
The Aransas Project filed the federal lawsuit Thursday in Corpus Christi.
The suit alleges policies of the Texas Commission on Environmental Quality allowed excessive amounts of water to be drawn from rivers, harming the birds in violation of the Endangered Species Act.
The agency didn't comment on the suit Thursday.
A record 23 whooping cranes died in the 2008-09 South Texas wintering season.
The Aransas Project says lack of freshwater inflows dried up food and water supplies.
There are about 400 wild whooping cranes left, 264 in the only naturally migrating flock that winters in south Texas.