This winter will be a hard one for the whooping crane, one of the most endangered species in the world. The last remaining natural flock of the rare birds took a devastating loss last year at its wintering grounds at the Aransas Natural Wildlife Refuge. The flock lost 23 birds, a heavy blow to a species that only counts an estimated 263.

This November-to-March wintering season is expected to be just as hard on the big birds. At about 5 feet, they are the tallest in North America.

The immediate cause of last winter’s die-off was the scarcity of blue crabs, the chief source of food for the birds during their time along the Gulf Coast. But some environmentalists believe the real cause is far upstream from the coastal marshes where the birds winter.

In December, a coalition of environmentalists filed paperwork in preparation to suing the state, alleging that regulators have allowed too much water to be taken out of the Guadalupe-Blanco river watershed, to the detriment of the cranes. Developers of subdivisions, industry operators and agricultural interests far from the Gulf Coast — the Guadalupe-Blanco watershed includes parts of the Hill Country may not think of their own water needs as competing with the water demands of whooping cranes. But the survival of the species is connected with the health of the river. Read the entire article »