aesculapian snake on branch

aesculap aesculapian aesculapius animal antique asclepius asklepios beautiful bite branch caution closeup coldblooded colubridae constrictor crawling creature creeping dangerous elaphe europe fascinating fear fearsome forest frightening greece greek habitat healing humid long longissima longissimus macro medicine natural outdoors panorama pharmaceutical pharmacy portrait reptile reptilian scale scary serpent serpentes serpentine sliding slither snake snakeskin species symbol tree unsafe wideangle wild wildlife zamenis zoology