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Genus Cuterebra - Rodent and Lagomorph Bot Flies

Unknown Fly - Cuterebra Bot fly - Cuterebra fontinella Mystery Fly - Cuterebra fontinella Oestridae 8-19-11 01d - Cuterebra tenebrosa Weird Bug_IMG_3377 - Cuterebra buccata - female Unknown fly - Cuterebra fontinella - male No idea - Cuterebra fontinella bot fly - Cuterebra
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon (Calyptratae)
Superfamily Oestroidea
Family Oestridae (Bot Flies)
Subfamily Cuterebrinae (New World Skin Bot Flies)
Genus Cuterebra (Rodent and Lagomorph Bot Flies)
Other Common Names
Rabbit Bots; Rodent Bots
Pronunciation
q-teh-REB-ruh
Numbers
26 spp. in our area(1)
Size
Large flies, typically bumble bee size.
Range
most of NA
Habitat
Habitat is less important to these flies than the host mammals. Habitat-specific rodents or rabbits means habitat-specific species of bots.
Life Cycle
Females typically deposit eggs in the burrows and "runs" of rodent or rabbit hosts. A warm body passing by the eggs causes them to hatch almost instantly and the larvae glom onto the host. The larvae are subcutaneous (under the skin) parasites of the host. Their presence is easily detected as a tumor-like bulge, often in the throat or neck or flanks of the host. The larvae breathe by everting the anal spiracles out a hole (so they are oriented head-down inside the host). They feed on the flesh of the host, but only rarely does the host die as a result.
Remarks
Larvae are common. George "Jeff" Boettner tells of live-trapping rodents where up to 80% of the populations had bot parasitism. Adult flies are almost never seen, though in western North America the males are known to "hilltop" from about 9 AM until noon on isolated buttes in arid habitats.