Moose-parasite
Guides
Haematobosca alcis
Moose Fly
Haematobosca alcis, commonly known as the moose fly, is a blood-feeding muscid fly specifically associated with Shiras moose (Alces alces shirasi) in Yellowstone National Park. The species was first described by Snow in 1891 and is one of the few Muscidae species specialized for hematophagy on large mammals. Its common name reflects this obligate host relationship.