*See postscript below for comments/feedback on this post including the uncertainties regarding the 'white-backed' Pied Wheatears of Cape Kaliakra.
Cape Kaliakra is famous for it's breeding population of Pied Wheatears. In previous years there have been regular reports of presumed hybrid Pied x Eastern Black-eared Wheatears (see ebird etc) and indeed this Spring several hybrid birds were present (at least three males).
This post looks at some of the birds present in Spring 2021 (and also some birds from a previous autumn trip in 2019) and also compares a few songs and calls between presumed Pied Wheatears and hybrid Pied x Eastern Black-eared Wheatear.
Spring Wheatears are arguably at their most striking and distinctive following the tips to the autumn/winter feathers wearing away to reveal the characteristic summer plumages. These birds provide the best basis for establishing the hybrid contingent within the local breeding population. Both presumed pure Pied and hybrids were holding territory and presumed to be breeding in the area. At least one male Pied Wheatear was ringed so the population is presumably under study (any more details would be greatly appreciated).