- Bill length, which I estimate at slightly over twice the head diameter
- Width of black bands on tail feathers, clearly wider than the white bands
- Freshwater rather than saltwater habitat
So far, the all-clinching call has not been heard, and the bird is still feeding (16/01) in an extremely secluded pond, where it is unlikely to be accidentally flushed.
Also of note this month, one Red-throated Pipit (Anthus cervinus) on 15/01, a dark morph Booted Eagle (Hieraaetus pennatus) on 16/01, a couple of Hoopoes (Upupa epops) on 09/01, and various sightings of Barbary Falcon (Falco pelegrinoides), both single birds and pairs.