The US Supreme Court let stand a 5th Circuit ruling in favor of TCEQ. Guadalupe Blanco River Authority had sued saying a TCEQ action caused the death of a bunch of whooping cranes.
GBRA was trying to show a regulatory taking of property, which means something of value had to be taken (whooping cranes) and it was the fault of the government (TCEQ).
In this case, not so much proof of a regulatory taking according to the courts. A win for TCEQ. A loss for lovers of whooping cranes.