What external parasite is known as the cattle grub?

The term "cattle grub" specifically refers to the larvae of the heel fly, particularly the species Hypoderma bovis and Hypoderma lineatum. These are external parasites that infest cattle and are known for their lifecycle, which involves the larvae burrowing under the skin of the host animal. The presence of these grubs can cause significant damage to the hide and reduce overall animal productivity due to stress and potential infections.

The heel fly lays eggs on the cattle's legs, and when the larvae hatch, they enter the host's skin. This biological characteristic of moving within the animal and the symptoms associated with this infestation (such as Swelling and pain) highlight why heel flies are referred to as cattle grubs.

In contrast, nasal bots are bot flies that affect the nasal passages of various animals, ticks are known for blood-feeding and spreading diseases, and lice are small insects that infest the skin and hair of animals. Each of these has its unique implications and management challenges, which differ significantly from the issue posed by cattle grubs.