When differentiating the male Whinchat from the Stonechat, what specific detail distinguishes their throat/chest plumage?

Answer

The Stonechat male’s throat is black down to the chest, whereas the Whinchat male has the warm apricot wash extending up towards the throat, interrupted by the black.

A critical distinction between the male Whinchat and the very similar Stonechat lies in how the dark throat color transitions to the chest plumage. In the Stonechat male, the black throat coloration extends continuously downward, reaching the chest area without interruption. In contrast, the male Whinchat exhibits a warm apricot or rusty orange-buff wash on the breast, and this color extends upward, interrupting the black of the throat, creating a clear demarcation where the two colors meet before the black fully dominates the upper throat region.

When differentiating the male Whinchat from the Stonechat, what specific detail distinguishes their throat/chest plumage?
birdmorphologycharacteristicPlumageWhinchat