Fig. 1

Baited box test apparatus and example images. a The complete bioassay and video system with (left to right): LED (not visible inside clamp); diffuser; test chamber on adjustable table; camera and Nikon lens. Test chamber b without entry port (early version) and, c with entry port (blue ring). Sample still images from test videos (60 mm lens), showing: d resting post-landing, e probing, and f blood feeding pre-defaecation