Migrating birds have stowaways: Invasive ticks could spread novel diseases around the world, say scientists

Ticks travel light, but they carry pathogens with them. When they parasitize migrating birds, these journeys can take them thousands of miles away from their usual geographic range. Historically, they haven’t been able to establish themselves due to unsuitable climate conditions at the other end of their long journeys. But now, thanks to the climate crisis, it’s getting easier for ticks to survive and spread, potentially bringing novel tick-borne pathogens with them.

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