While talking to Martin Swannell and David Smith during a visit to Earls Barton GP late afternoon on Tuesday 15th April, MS picked up a ‘yellow’ wagtail in flight before it dropped down in a muddy corner at the eastern end of New Workings (South), about 60 metres away from where we were standing.
Looking through bins, it was immediately apparent that this was no ordinary Yellow Wagtail as it had strikingly grey upperparts and bold, white tips to the median coverts, which produced a noticeably strong white wing-bar. Scope views enabled more detail to be seen as the bird moved around feeding and, appearing fidgety, flying short distances within the area.
Looking like a female, to my eyes, the bird had a citreola vibe to it but it was certainly not identifiable as a Citrine Wagtail, as it lacked a number of diagnostic features of that species.
An interesting looking bird with a grey mantle that was concolourous with the nape and extended into the crown, the latter then merging into a yellowish-grey forehead, itself merging with the supercilium above the dark lores. On rear views, the rump had a slight greenish tinge to it.
Pro-citreola features are the grey upperparts, strong white median covert tips and strong(est) yellow colouration on the throat as opposed to the belly. Pro-flava features are off-white/yellow-buff-tinged greater covert tips, yellow undertail coverts and lack of supercilium curving around behind ear coverts.
After some 15 minutes, the bird flew off north and, unfortunately, was not heard to call.
Individuals with almost identical features to this have been recorded in the UK on previous occasions (see here) and a Citrine x Yellow Wagtail hybrid, photographed in July 2010, appears not too dissimilar but with a more Citrine-like head pattern (see here). Mixed pairs have bred in Poland, while hybrids have also been recorded in India, Israel and the United Arab Emirates, although images (here) appear to show birds with more striking head patterns, which are probably males.
The above bird, though exhibiting hybrid characteristics may, of course, be an established, unknown Yellow Wagtail variant – an alternative advocated by Martin Garner back in 2012 …
References and suggested reading for further information
Discover more from Northants birds
Subscribe to get the latest posts sent to your email.
Northants birds 
One thought on “Citrine Wagtail x Yellow Wagtail hybrid … or what?”