Longitudinal study shows that migrating birds can carry several species of ticks. We cannot know how many ticks fell off in transit? The theory that Lyme disease was being spread by bird migration and may result in variations in Borrelia was greatly championed by Dr. Edwin Masters of Missouri, who pointed out that the Canadian flyway of bird migration goes right through the midwest and may result in epidemiology of the disease different than the NE USA or the Pacific coast. Read the study here http://dx.doi.org/10.3201/eid1810.120511 .
Migratory Birds Carrying Ticks and Lyme