Cuckoo's and Whinchats in Angus

A few distant photos of a male Cuckoo heard calling today in Angus, there appeared to be a second younger looking male bird in the same area, both together in flight at one point. Also seen two Whinchats and my first Swift of 2015.

Calling from this tree

Appeared to be feeding in between calling

Off to another fence post or tree to call again

Whinchat