An American Purple Gallinule (Porphyrio martinicus) is a "swamp hen" in the rail family. The nest is a floating structure in a marsh with typically five to ten eggs. They are omnivorous with a diet including a wide variety of plant and animal matter, including seeds, leaves, fruits of both aquatic and terrestrial plants as well as insects, frogs, snails, spiders, earthworms and fish. Anahuac National Wildlife Refuge. Anahuac, Texas.