prothonotary warbler perched on tree branch. close-up of bird face, beak, feathers. yellow, green, brown plumage. spring

warbler protonotaria citrea closeup tree branch spring migration bird marsh wildlife area forest habitat leaf nature wood perched singing yellow green brown plumage feathers beak face woodlands trees leaves background marshy season time year period annual fly flycatcher flyway birdwatching birding ornithology outdoor landscape scenery environment ecofriendly conservation reserve