Additionally, we provide several search tools in the new site. We currently support interactive searches, allowing a single RNA sequence to be searched against the whole Rfam database, and a batch search tool for searching multiple sequences against Rfam, the results of which are returned to the user via email. A new taxonomy search tool allows the user to find Rfam families that are specific to a given taxonomic level, or those found in a set of taxonomic levels that are specified by a complex, boolean query. For example, the query 'Drosophila AND Caenorhabditis NOT Mammalia' returns the two Rfam families (RF00047 and RF00533) that contain sequences from both drosophila and caenorhabditis but no sequences from any mammalian species.