Dusty,
Sounds like your pond is near Lake Arrowhead or Kickapoo...or somewhere in that neighborhood. You are on the western edge of a cormorant flyway. They are black birds, long neck, hooked beak. They dive and eat. Since you stocked fingerling catfish, odds are they are too small to be intriguing to water turkeys, and nearby lakes offer better food. But, watch out for these dastardly fish eaters and encourage their further travel, away from your pond. Catfish are easy, and inexpensive to raise. They don't necessarily need cover and will come to floating fish food, once temperatures rise a bit. Typically, around Wichita Falls, those temps are close to "right" by the second week of March. Berend Bros. sells the best fish food in your area.