Black Redstart
Phoenicurus ochruros
The black redstart is 13–14.5 cm (5.1–5.7 in) in length and 12–20 g (0.42–0.71 oz) in weight, similar to the common redstart. The adult male is overall dark grey to black on the upperparts and with a black breast; the lower rump and tail are orange-red, with the two central tail feathers dark red-brown. The belly and undertail are either blackish-grey (western subspecies; see Taxonomy and systematics, above) or orange-red (eastern subspecies); the wings are blackish-grey with pale fringes on the secondaries forming a whitish panel (western subspecies) or all blackish (eastern subspecies).
ID text from Wikipedia, CC BY-SA 4.0
Plumbeous Water Redstart
Phoenicurus fuliginosus
The plumbeous water redstart is typically 14 centimetres (5.5 in) long in total, with an average weight of 22 grams (0.78 oz) for males and 18.8 grams (0.66 oz) for females. The male birds are slate blue in colour with a tail that is rusty red. On the other hand, female birds are pale grey and feature a white rump.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Black Redstart and Plumbeous Water Redstart.