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Magpies hold grudges and will swoop the same people time and time again, a new study has found.
With spring already here, cyclists are being warned to watch out for swooping magpies with the Griffith University finding they do not pick their prey at random.
It was often thought magpies swooped out of territorialism, but Professor Darryl Jones said magpies swoop when they feel their young have been threatened and know whom they are going after.
Prof Jones said magpies tend to go after fast-moving objects like cyclists and motorbike posties and will continue to go after those people throughout their lives.