WormBook has further expanded its coverage of parasitic nematodes this month with the addition of “The biology and genome of Heterorhabditis bacteriophora” to the Genetics and genomics section of WormBook and “Strongyloides stercoralis: a model for translational research on parasitic nematode biology” to WormMethods. Additionally, “Biogenic amine neurotransmitters in C. elegans” has just been added to the Neurobiology and behavior section. In order to find out about new additions to WormBook, please sign up at www.wormbook.org/announce.html or access the WormBook RSS feed.