Any comments on answers Dave?
Hah, indeed - got completely distracted that afternoon by the TetZoomCon and forgot to get back to it!
1. You would indeed go to the Museum of Natural Sciences in Brussels to see the skin of the last male Great Auk - and if one wanted to see his internal organs, they are held at the natural history museum in Copenhagen (along with the organs of the female killed alongside him). The exact location of the skin of the female is still under debate, but last I heard has been pinned down to two possibilities.
2. Per the most recent taxonomic and genetic research, the tinamou family seem to be deeply nested within the ratite radiation and are the sister group of the moas - the kiwis are, it seems, rather more distantly related.
3. The Tyne Bridge is indeed the furthest inland colony of Black-legged Kittiwake anywhere in the world - and, given the decline of seabird populations across the world, quite a significant one in those terms too.
4. With the extinction of the Andalusian Buttonquail, this family is now extinct from Europe.
5. My location is something of a hint towards the correct answer, and it is indeed the Eider or Cuddy Duck, named for St Cuthbert - a notable Anglo-Saxon saint of Northumbria.
6. The Forest Owlet was rediscovered in 1996 after it was discovered that Richard Meinertzhagen had stolen the last known specimen and resubmitted it with fraudulent locality information, and therefore zoologists searching for the species had been seeking it in entirely the wrong location.
7. These two species were indeed described by father and son -
Hylaeosaurus by Gideon Mantell, the Takahe (specifically the extinct northern species, as the southern species was discovered later) by Walter Mantell.
8. The link is indeed the word "apoda" and incorrect belief these birds lack feet.
9. After a massive population expansion, it would be hard to believe that the Collared Dove was absent from Europe entirely until the 20th century, and first bred in the UK in the 1950s! Sadly the Turtle Dove is heading in the reverse direction......
10. This is indeed the kestrel

of course, had I not specified bird-of-prey one could have also said Wheatear......
I think
@Tetzoo Quizzer won this one pretty clearly - if you don't feel like running another round, feel free to pass it onto someone else of your choice.