doctorscience's Identifications

Live larvae extracted from three living fledgling barn swallows (legally, by wildlife rehabbers). Each was about the length of a grain of rice and the diameter of a mealworm, and were present all over the swallow’s bodies, especially in the head and neck area. They were all well under the skin with a hole through which to breathe and responded to touch by retreating further into the hole. I know the picture isn’t great for ID but hopefully adding the host + size can help narrow it down.