boiubu lichtensteins green racer (philodryas olfersii) slithering

animal biology boiubu branch brazil coldblooded colorful crawling creature curve danger descending drooping exotic eye going green lichtensteins motion move mutation natural nature olfersii pet philodryas poison predator racer reptile serpentine serums sinister skin sliding slither slithering snake species themes tongue tree vertebrate wild wildlife zoology