''Xenopsylla gratiosa'' is a

flea Flea, the common name for the order (biology), order Siphonaptera, includes 2,500 species of small flightless insects that live as external parasites of mammals and birds. Fleas live by hematophagy, ingesting the blood of their hosts. Adult f ...

found on seabirds including the

European storm petrel The European storm petrel (''Hydrobates pelagicus''), also known as British storm petrel, or just storm petrel, is a species of seabird in the northern storm petrel family, Hydrobatidae. The small, square-tailed bird is entirely black except f ...

. Along with dermanyssid

mite Mites are small arachnids (eight-legged arthropods) of two large orders, the Acariformes and the Parasitiformes, which were historically grouped together in the subclass Acari. However, most recent genetic analyses do not recover the two as eac ...

s, these blood-sucking parasites slow the growth rate of nestlings and may affect their survival rate.

References

{{Taxonbar, from=Q10722095 Pulicidae Insects of Europe Parasites of birds