Yesterday an Eastern Yellow Wagtail was reported at Herdla. A grey-and-white bird with a rasping call...
Today I went to check the bird and make sound recordings. Eastern Yellow Wagtail is very difficult to identify. A typical bird is grey and white without yellow and should have all its retained juvenile median and greater coverts, a long hind claw and a rasping call. This bird had some of these characteristics. It was basically grey and white, but with warm tones, not cold. The coverts seemed to be of one age, but I think that is difficult to judge. The hind claw seemed a bit shortish. But the call was striking: yellow wagtail, but harsh and rasping, reminding of Citrine Wagtail. Below a recording of it as well as a sonogram of the recordings. On the second recording, it seemes that the bird called a bit more as a western bird, but that is difficult to judge.
I don't know if this bird has enough characteristics for a positive identification, the NSKF has the last word
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