Cold Edge

Tufted duck with 5 young

2 Scaup (14 July)

I've posted these photos because it is interesting to compare Tufted Duck and Scaup when plumage is no help telling them apart. Of the Scaup photos on 14 July, no. 5 is too distant to be useful, and nos. 1-3 are clear cut: no Tufted has a bill like those birds have. But the birds in photo no. 4 (reposted above) are more problematic:

- they have no tuft, but today's Tufted has none either (? moulted) - it does not even have a 'bump' on the nape;

- these Scaup's bills from the side are less massive than those in photos 1-3: they look similar to the Tufted's: they are probably broader but we cannot see that: (do female Scaup have smaller bills than males?);

- so (apart from their being with definite Scaups) it comes down to head profile: the highest point on the Tufted's crown is about half way along, and there is a slight bend at the nape - giving the head a squarish shape: in the Scaups the highest point on the crown is further forward - just behind the eye - and then the crown, nape, and hindneck curve smoothly downwards with no interruption - so the head does not look square.

Finally, a very useful thing I've noticed is that, when diving, Scaups tend to spend far longer under water than a Tufted Duck ever does.