the chimney swift carries a number of internal and external parasites. it is the type host for the nematode species "aproctella nuda", the feather mite species "euchineustathia tricapitosetosa", and the biting lice species " dennyus dubius", and is also known to carry the tapeworm species "pseudochoanotaenia collocaliae". its nest is known to host the hemiptera species "cimexopsis nyctali", which is similar to the bed bug and can (on rare occasions) become a pest species in houses.