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
USS Calamus (AOG-25) as did the combatant ships. While at Okinawa "Calamus" was beached as a result of Typhoon Louise, 9 October 1945, refloated 24 October 1945, repaired and returned to service. Following occupation service, "Calamus" returned to San Francisco, California, 20 March 1946 and was struck from the Navy list (date unknown). She was decommissioned 15 May 1946, and transferred to the Maritime Commission 4 September 1946. Final disposition: she was scrapped in 1964. "Calamus" received one battle star for service in World War II. Her crew was eligible for the following medals: USS Calamus (AOG-25) USS "Calamus" (AOG-25) was a "Mettawee"-class