An unexpected White Wagtail or hybrid and some juvenile chats

A muck heap on the edge of Beeley Moor has proven to be a magnet for small insect feeding birds this week. As well as many Pied Wagtails I came across a single bird showing characteristics of White Wagtail feeding there, which is only the second I've seen locally. Our Pied Wagtail is a race of the continental White Wagtail which is a regular visitor to our coast and wetlands in the spring. Seeing one here in the summer is very interesting and raises the possibility that it could be breeding, either with another White wagtail or more likely with a Pied. Intriguingly I did photograph another pale backed bird that was probably a hybrid White x Pied Wagtail.

Update: I sent details of the upper bird to Peter Adriaens a Dutch birder who is the author of the most recent article on the separation of White Wagtail from Pied Wagtail. He commented as follows;

I agree that it shows a grey rump, which would be very unusual for a yarrellii. 

Its upperparts look rather dull grey with some dark streaks though, which is more typical of yarrellii but can also be shown by worn alba in summer. 

The flanks look rather dark and extensively grey. 

It could be a dark alba, but I am not fully convinced, and I certainly cannot exclude a hybrid. 

Based on his comments it's perhaps safest to leave the bird as a possible hybrid.

White Wagtail male (upper) with probable hybrid White x Pied Wagtail (lower)

As well as the wagtails there were also several family parties of Stonechat and Redstart which provided some great photo opportunities.

Stonechat juvenile male

Common Redstart juvenile