redwing blackbird female feeding in a swamp

red wing blackbird male singing redwinged agelaius phoeniceus passerine bird icteridae dimorphic black shoulder yellow markings defense territory grassy wetlands freshwater marshes cattail swamps nests montezuma wildlife cayuga lake northern flyway refuge migration marshland astaxanthin carotenoid lutein canthaxanthin zeaxanthin feathers color plumage northernflyway breeding springtime seasonal cattails nesting avian ornithology habitat nature copyspace textarea reed feeding hunting duckweed insects swamp marsh wetlandtrust owascoinlet inlet spring