The moorhen flea (''Dasypsyllus gallinulae'') is a

flea Flea, the common name for the order Siphonaptera, includes 2,500 species of small flightless insects that live as external parasites of mammals and birds. Fleas live by ingesting the blood of their hosts. Adult fleas grow to about long, a ...

originating from South America. It is now globally widespread. It is a large flea, easily identified because the male has two heavy horn-like spines on one of the genital flaps, and the female has a deep "bite" on the seventh sternite. It is found in bird nests, and is more likely to be found on the bird's body than, say, the chicken flea, which is normally found in the nest. The moorhen flea's many hosts include the

common moorhen The common moorhen (''Gallinula chloropus''), also known as the waterhen or swamp chicken, is a bird species in the rail (bird), rail family (Rallidae). It is distributed across many parts of the Old World. The common moorhen lives around well-v ...

Eurasian woodcock The Eurasian woodcock (''Scolopax rusticola'') is a medium-small wading bird found in temperate and subarctic Eurasia. It has cryptic camouflage to suit its woodland habitat, with reddish-brown upperparts and buff-coloured underparts. Its eyes ...

grouse Grouse are a group of birds from the order Galliformes, in the family Phasianidae. Grouse are presently assigned to the tribe Tetraonini (formerly the subfamily Tetraoninae and the family Tetraonidae), a classification supported by mitochondria ...

European robin The European robin (''Erithacus rubecula''), known simply as the robin or robin redbreast in Great Britain & Ireland, is a small insectivorous passerine bird that belongs to the chat subfamily of the Old World flycatcher family. About in len ...

goldcrest The goldcrest (''Regulus regulus'') is a very small passerine bird in the kinglet family. Its colourful golden crest feathers, as well as being called the "king of the birds" in European folklore, gives rise to its English and scientific ...

, willow tit,

Eurasian treecreeper The Eurasian treecreeper or common treecreeper (''Certhia familiaris'') is a small passerine bird also known in the British Isles, where it is the only living member of its genus, simply as treecreeper. It is similar to other treecreepers, and ha ...

and blackbirds.

References

Ceratophyllidae Insects described in 1878 Parasites of birds Insects of South America {{Flea-stub