barnacle geese & x28;branta leucopsis& x29; on grassland

alert animals attention attentive avian barnacle biology bird birdlife birds black branta conservation environment evolution farming farmland field flock gaggle geese grassland grey habitat legs leucopsis lowlands marsh marshland natural nature observe observing ornithology pattern patterned patterns plumage plump portrait protect protection scotland skein species stand standing striped stripes wader wades wading walk walking watching wetlands white wildlife winged wings