Three records of Red Knots Calidris canutus possibly changing flyways

摘要

In recent years, re-sightings of individually-marked shore-birds have afforded many new insights into the migratory journeys they make; and occasionally they have revealed movements that could not have been predicted. Here we discuss three such movements involving Red Knots Calidris canutus that show unexpected links between sites previously thought to be used exclusively by two different subspecies, rufa and islandica.