FIGURE 2 in Illustrated Key to the Snakes of the Philippines

FIGURE 2. Typical characteristics of snakes. (A–C) scales of the head of most snakes (Tropidonophis dendrophiops, KU 310368); (D) body and tail length measurements of snakes; (E–G) scales of the head of most blindsnakes (Ramphotyphlops suluensis, PBS 2001, redrawn from Taylor 1918); heat sensing pits of (H) pythonids (Malayopython reticulatus, KU 330021), and (I) and viperids (Trimeresurus flavomaculatus; KU 329422); (J) scales of the ventral surface of the tail and posterior body of most snakes (Cyclocorus lineatus alcalai; KU 324539); (K) method for counting the number of dorsal body scale rows.