Eurasian blue tit host is "Proctophyllodes stylifer". However, this mite seems to be of no concern to the bird as, until now, it is only known to feed on dead feather tissue. "P. stylifer" lives all its developmental stages, i.e. egg, larva, protonymph, tritonymph and adult, within the plumage of the same host. The usual sites where "P. stylifer" is encountered are the remiges and the rectrices of the bird where they can be found tandemly positioned between the barbs of the rachis. The Eurasian blue tit is classified as a least concern species on the IUCN Red List (version 3.1), and as
Acorus calamus finger and has numerous coarse fibrous roots below it. The exterior is brown and the interior white. Sweet flag is native to India, central Asia, southern Russia and Siberia, and perhaps Eastern Europe. It also grows in China and Japan. It was introduced into Western Europe and North America for medicinal purposes. Habitats include edges of small lakes, ponds and rivers, marshes, swamps, and wetlands. In addition to "sweet flag" and "calamus" other common names include beewort, bitter pepper root, calamus root, flag root, gladdon, myrtle flag, myrtle grass, myrtle root, myrtle sedge, pine root, rat root, sea sedge, sweet