The redhead duck is arguably among the handsomest of waterfowl. That is of course a matter of opinion. But here's a fact: eighty percent of all North American redhead ducks spend their winters concentrated along the lower Gulf Coast of Texas in the Laguna Madre. The birds have an affinity for, if not an obligation to, freshwaters situated near salty shores. They feed on shoalgrass in the Laguna and fly inland to purge excess salts. Redheads, like most birds that feed in saltwater have a salt gland near the eye that excretes excess salts ingested while feeding. It is essential that salt be purged daily in freshwater ponds. And knowing the array of habitats frequented by the bird during south Texas winter sojourns is essential for Dan Collins.
Duck Data, 2015: Photovoltaic Cells, Satellites, GPS and Doppler Radar
