Lataste's viper ♀. Vipera latastei (Madrid, Spain) Ladder snake juvenile. Rhinechis scalaris (Hoces del Duratón, Avila, Spain) Lataste's viper. Vipera latastei (Madrid, Spain) Montpellier snake juvenile. Malpolon monspessulanus (Robledo de Chavela, Madrid, Spain) Eyelash Viper. Bothriechis schlegelii (Pacuare Reserve, Costa Rica) Terciopelo or Fer-de-Lance viper. Bothrops asper (Pacuare Reserve, Costa Rica)