Large Turkey Louse vs Throat Bot Fly of Horses

Side-by-side species comparison

Attribute Large Turkey Louse Throat Bot Fly of Horses
Scientific Name Chelopistes meleagridis Gasterophilus nasalis
Order Phthiraptera Diptera
Family Philopteridae Oestridae
Size 3-5 mm 11-15 mm
Habitat Farmland Farmland
Diet Omnivores Omnivores
Regions North America, Europe Worldwide wherever horses are kept
Conservation Least Concern Least Concern

Large Turkey Louse

The largest louse found on domestic turkeys, feeding on feather material. It prefers the breast and thigh feathers of its host.

💡

Did You Know?

Benjamin Franklin studied this louse while advocating for the turkey as America's national bird.

Throat Bot Fly of Horses

A yellowish-brown bot fly that lays eggs under the jaw of horses. Larvae migrate to the area between the teeth and gums before traveling to the pyloric region of the stomach and duodenum. It is one of the most common horse bot flies worldwide.

💡

Did You Know?

Unlike other horse bots, this species' larvae prefer the duodenum over the stomach, a unique niche among Gasterophilus species.