''Lipoptena mazamae'', the Neotropical deer ked, is a fly from the

family Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...

Hippoboscidae __NOTOC__ Hippoboscidae, the louse flies or keds, are obligate parasites of mammals and birds. In this family, the winged species can fly at least reasonably well, though others with vestigial or no wings are flightless and highly apomorphic. As ...

. They are blood-feeding

parasite Parasitism is a close relationship between species, where one organism, the parasite, lives on or inside another organism, the host, causing it some harm, and is adapted structurally to this way of life. The entomologist E. O. Wilson has ...

s of the

white-tailed deer The white-tailed deer (''Odocoileus virginianus''), also known as the whitetail or Virginia deer, is a medium-sized deer native to North America, Central America, and South America as far south as Peru and Bolivia. It has also been introduced t ...

- ''Odocoileus virginianus'' in the southeastern United States and Central America, the

red brocket deer The red brocket (''Mazama americana'') is a species of brocket deer from forests in South America, ranging from northern Argentina to Colombia and the Guianas. It also occurs on the Caribbean island of Trinidad (it also occurred on the island of ...

- ''Mazama americana'' in Mexico to northern Argentina, and also an incidental parasite of domestic

cattle Cattle (''Bos taurus'') are large, domesticated, cloven-hooved, herbivores. They are a prominent modern member of the subfamily Bovinae and the most widespread species of the genus ''Bos''. Adult females are referred to as cows and adult ma ...

, Cougars - ''Puma concolor'', and man. Deer keds are small brown, flattened flies . Females are slightly larger than males, with a body length of 3.5-4.5 mm for females 3 mm for males. They have a tough protective

exoskeleton An exoskeleton (from Greek ''éxō'' "outer" and ''skeletós'' "skeleton") is an external skeleton that supports and protects an animal's body, in contrast to an internal skeleton (endoskeleton) in for example, a human. In usage, some of the ...

to prevent them from being crushed. They shed their wings upon finding a suitable host. As in all Hippoboscidae, both males and females are blood feeders. They are often misidentified as

tick Ticks (order Ixodida) are parasitic arachnids that are part of the mite superorder Parasitiformes. Adult ticks are approximately 3 to 5 mm in length depending on age, sex, species, and "fullness". Ticks are external parasites, living by ...

s. The female fly will produce a single

larva A larva (; plural larvae ) is a distinct juvenile form many animals undergo before metamorphosis into adults. Animals with indirect development such as insects, amphibians, or cnidarians typically have a larval phase of their life cycle. ...

at a time, retaining the larva internally until it is ready to

pupa A pupa ( la, pupa, "doll"; plural: ''pupae'') is the life stage of some insects undergoing transformation between immature and mature stages. Insects that go through a pupal stage are holometabolous: they go through four distinct stages in thei ...

te. The larva feeds on the secretions of a milk gland in the

uterus The uterus (from Latin ''uterus'', plural ''uteri'') or womb () is the organ in the reproductive system of most female mammals, including humans that accommodates the embryonic and fetal development of one or more embryos until birth. The ...

of the female. After three larval

instar An instar (, from the Latin '' īnstar'', "form", "likeness") is a developmental stage of arthropods, such as insects, between each moult (''ecdysis''), until sexual maturity is reached. Arthropods must shed the exoskeleton in order to grow or ...

s, a white pre-pupa which immediately forms a hard dark puparium. The pupa is usually deposited where the deer slept overnight. When the pupa has completed its pupation, a winged adult emerges and flies in search of a suitable host. On finding one, the fly sheds its wings and is permanently associated with the same host. This is typical of most members of the family Hippoboscidae. ''L. mazamae'' are known to carry several species of the ''

Bartonella ''Bartonella'' is a genus of Gram-negative bacteria. It is the only genus in the family Bartonellaceae. Facultative intracellular parasites, ''Bartonella'' species can infect healthy people, but are considered especially important as opportunis ...

bacterium Bacteria (; singular: bacterium) are ubiquitous, mostly free-living organisms often consisting of one biological cell. They constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria were amon ...

, but it has not yet been positively proved whether they are active

vector Vector most often refers to: *Euclidean vector, a quantity with a magnitude and a direction *Vector (epidemiology), an agent that carries and transmits an infectious pathogen into another living organism Vector may also refer to: Mathematic ...

s of ''Bartonella'' infections, or just carry the bacterium as a by product of their blood feeding habits.

References

Diptera of North America Parasitic flies Parasitic arthropods of mammals Hippoboscidae Insects described in 1878 Taxa named by Camillo Rondani {{Parasite-insect-stub