Gasterophilus intestinalis, also known as horse bot fly, is a species of insect of the family Oestridae,[2] and is found worldwide.

[4] The female fly cements individual eggs onto hairs of the forelimbs and shoulders of horses, mules and donkeys.

[4] The main impact on the host is the nuisance of the adults as they repeatedly land on the legs when attempting to lay eggs.

[4] Parasiticides which are effective against the larvae include macrolytic lactones, such as ivermectin and moxidectin, and organophosphates, such as metrifonate (also known as trichlorphon) and dichlorvos.

[10] However, it is important to wash your hands after physically removing the eggs because there is a possibility of the larvae burrowing into the human skin.

[11] In addition to removing the eggs manually, there are a few management changes that can be made to decrease the amount of bot flies.