red-winged blackbird in cano negro wildlife refuge, costa rica

blackbird redwinged agelaius phoeniceus cano negro wildlife refuge costa rica bird perched branch nature avian fauna outdoors wild aves passeriformes icteridae conservation habitat ecology biodiversity ornithology feathers eyes flora environment natural reserve ecosystem biology observation watching greenery foliage perching plumage wing tail species zoology field research preservation passerine terrestrial vertebrate Cañonegro