27 November 2020:
Hooded mergansers (Lophodytes cucullatus) are twice named for their crests which they raise and lower at will. “Hooded” refers to the crest, of course. So does the Greek Lophodytes: lophos = crest + dutes = diver.
Females do the crest thing, too.
And in slow motion …
Best pandemic hair. pic.twitter.com/FWmHjw9oWY— Heidi (@heidicleven) November 21, 2020
… it’s the best crest.
(photo at top by Steve Gosser. Female mergansers from Wikimedia Commons; click on the caption to see the original)