Several species of chewing lice (Order: Phthiraptera) parasitize Toco Toucans, including Austrophilopterus cancellosus (Weckstein 2004, Price and Weckstein 2005) and Myrsidea witti, a member of the Myrsidea victrix group (Price et al. 2004). Austrophilopterus cancellosus is found on all Ramphastos toucans, while M. witti is known only from R. toco. Phylogenetic data on Austrophilopterus indicate that the A. cancellosus found on R. toco are the same as those found on R. tucanus and R. vitellinus from southern Amazonia (Weckstein 2005). There is no information related to topics such as age at first breeding, life span and survivorship, dispersal, or population regulation.