Large (A–C) and small (D) trypomastigote of Trypanosoma spp. found in Yellow-vent bulbuls (Pycnonotus goiavier). Large morphotypes of YVBL-I showed a pale purple cytoplasm with scattered azurophilic granules (A), YVBL-II showed a purple cytoplasm with scattered pale spots (B), YVBL-III showed a deep purple cytoplasm with scattered pale spots (C). Small morphotype YVBS showed a well pronounced undulating membrane (D). Note: Free flagellum = black arrow, longitudinal striations (myonemes) = white arrow, pale spots = black arrow head, azurophilic granules = white arrow head.