"sign of spring", 8.5", Agelaius phoeniceus, April, USA, Wisconsin, adult, aggression, animal, beak, bill, bird, black, black bill, blackbird, brown, calling, cattail, cup nest, display, displaying, environment, fauna, feathers, gray, habitat, large bird, male, marsh, marsh bird, nature, north american, north woods, northwoods, perch, perched, perching, red, red winged, red-winged, red-winged blackbird, redwinged blackbird, sign of spring, sing, singing, song bird, songbird, spring, spring time, spring-time, springtime, striking, territorial, territory, white, wild, wildlife, wings, yellow