Do swallows have fleas?

Swallows have no fleas. Birds have no fleas, but parasites. Swallows are easy to breed parasites: Swallows often nest on cliffs or high buildings and are vulnerable to pests, so swallows may be parasitic with various parasites, such as mites and other insects containing germs. Yan Xiao, body length130 ~180 mm. The body is long, the mouth is small and sharp, the jaw is big, the wings are thin, and the tail has long and forked wings. Most of the feathers on the back are blue-black, so they were called mysterious birds in ancient times.