Keywords: Trigona-spinipes-nest-unicamp-01.png en Nest of stingless bees Trigona spinipes on the wall of a building at the State University of Campinas Brazil The nest is a couple of months old; it is built of dirt and other debris The greenish part possibly including cow or horse dung is the most recent addition A couple of bees are visible as bright specks The cinder blocks are about 40 cm wide and 19 cm tall excluding the mortar The wall is painted tan-beige; the white smudges below the nest are places where the paint peeled off showing the older white paint layer Picture taken by J Stolfi with a Sony DSC-V1 camera with some post-processing own Jorge Stolfi 2008 04 17 at 14 11 35 local time File Trigona-spinipes-nest-unicamp-05 png Trigona spinipes |