This is a database of published descriptions of behavior of spiders and other arachnids (mites, scorpions, etc.) You can enter a taxon name (mostly species) in the taxon search box and see a list of published behaviors for that taxon and links to the publication where they were mentioned.
Currently, there are annotations for several taxa (including Tetragnatha, Deinopis, Cupiennius salei, Leucauge mariana). You can enter a taxon name in the taxon box and if there are behavior annotations for the taxon, they will be listed. If the taxon is in the current taxonomy (a chunk of NCBI) but no behavior is listed, it will return a table with a link to the taxon term - currently this is the entry in OntoBee (not very useful), but this will change to point to the NBCI or alternative taxonomy page. Note that the publication links are now live and point to the publication's doi which will redirect to the publisher's page. Eventually each pub will have it's own generated page both to handle pubs without doi's or other URL's but also to provide information about the publication relative to this database.
There are also a couple of behavior terms that are available in a taxon cross-reference table (try 'posture' or 'predator behavior'). Note that there have been a number of corrections and improvements to site recently. The third form will have cross references for participants (either anatomical parts or components of the environment - prey, substrates, etc.).
The NCBI taxonomy does not include every species known to science. Species not in that taxonomy are represented by their LSIDs in the World Spider Catalog and equivalent resources for other groups.