jurek
Well-known member
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On the recent thread about European rarities, there was a discussion whether a vagrant Ashy Drongo could turn up in Norway. This made me interested.
How far away a sedentary species can move as a certain vagrant?
A short or a long distance migrant - how much further way it can go beyond, or to the opposite of its normal migration distance?
How do one actually measure a distance traveled by migratory birds other than ringing? In the case of the drongo, it was distance from the most extreme edge of the breeding range to the southern part of the wintering range. This may be sensible, because in migratory birds, often the populations from far north winter far south (probably because closer populations claim closer wintering areas).
I think that the number of unusual birds noticed in the Aleutians in the ABA area may be interesting - things like European Wood Warbler or Kentish Plover.
How far away a sedentary species can move as a certain vagrant?
A short or a long distance migrant - how much further way it can go beyond, or to the opposite of its normal migration distance?
How do one actually measure a distance traveled by migratory birds other than ringing? In the case of the drongo, it was distance from the most extreme edge of the breeding range to the southern part of the wintering range. This may be sensible, because in migratory birds, often the populations from far north winter far south (probably because closer populations claim closer wintering areas).
I think that the number of unusual birds noticed in the Aleutians in the ABA area may be interesting - things like European Wood Warbler or Kentish Plover.