Monotypic.
Plumage varies, notably in solid black crown (breeding) versus a black mask (non-breeding).
M/F similar.
The description in BOW of this bird is great.
★★☆☆☆ · 2024-03-21 · AU-QLD · 1160×774 (258×191) · ISO 51200 · Canon EOS R8
BIF · Breeding
★★☆☆☆ · 2024-03-18 · AU-QLD · 640×426 (167×146) · ISO 5000 · Canon EOS R8
BIF · Non-breeding