wildlife: a fer-de-lance bothrops asper is seen in a trail in peten, guatemala

agressive amarilla america asper barba beard bothrops coil coiled dangerous defensive ecuador english equis fer guatemala habitations habitats honduras human incidents lance lowland mexico nahuatl natural nauyaca necrosis north palotada panama park peten pit reptiles reserve snakebite snakes south southern spanish species temperament temperamental terciopelo velvet venom venomous viper wildlife yellow zotz