Botflies, also known as warble flies, heel flies, and gadflies, are a family of flies technically known as the Oestridae. Their larvae are internal parasites of mammals, some species growing in the host's flesh and others within the gut.

How do I know if I have bot flies?

Adult botflies have large bulbous heads covered with hair. The hair may be different colors, from black and white to reddish-orange. They are true flies, order Diptera, with only one set of wings. They are generally 1/2” to an inch long and have no functioning mouthparts at all.

Where are bot flies most common?

Where are Botflies most common? Dermatobia hominis, commonly known as human botfly, is found in Central and South America, from Mexico to Northern Argentina, excluding Chile.