Little Grebe
Tachybaptus ruficollis
A bird of many names inc: Diver (Renfrew), Diedapper (Norfolk, Hants, Dorset), Divedapper, Divedop (Lincs) Divy Duck and Dive an' Dop (Norfolk), Doucher and Jack Doucher (Salop), Dabber and Spider Diver, Bonnetie (Forfar). From Ireland we have: Penny Bird, Drink a Penny, Willie Hawkie and Tom Puddin', the latter also from Salop. We aint finished yet, I've saved the top two for last, From Stirling, we have 'Mither of the Mawkins', which apparently means a witch or uncanny person.
Number one tho' has to be 'Arsefoot'. Actually, that is a literal translation of the genus name Podiceps, so not only is it a great name, it shows you how most scientific names, which sound so scary and clever are usually totally prosaic, only in Latin (with a bit of Greek).
After all that arsefoot stuff, let me finish with a bit a culture, . Shakespeare, in 'Venus and Adonis'
  "Like a dive dapper peering through a wave,
  Who, being look'd on, ducks as quickly in."