An interesting question Cherry. Unfortunately , I don't know what the answer is!
You clearly get more value for money in Africa or Australia, where there are many more species and the lighting is better.
Here are a few random thoughts on European photographic opportunities.
GREECE
1.I still like Lesvos for the number of interesting species, photo opportunities and migration mayhem.
(2.NE Greece, including Lake Kerkini.)
UK
This is limited to a small number of select species.
1.White tailed Eagles. There are specialized tours and local regular boat trips.
http://www.portree-boat-trips.co.uk/wildlife-boat-trips.html
2.Red Kites.
http://www.gigrin.co.uk/hide.php
3.Island Seabirds: Farne Islands (near where I live)/Handa Island/Shetland Isles
http://scottishwildlifetrust.org.uk/reserve/handa-island/
http://www.shetlandphotographyholidays.co.uk/nature_images.html
SPAIN
1.There are a number of vulture feeding stations.
http://www.youtube.com/watch?v=yQYBvQMq3aw
2.Extremadura, but the lighting can be rubbish. Still , I could spend a lot of afternoons up the top of Monfrague castle trying to photograph Griffon Vultures at eye level.Go to the very top of the castle. Best to bring a torch to navigate the stairs.
NORWAY
1.Centred mainly round White Tailed Eagles/Divers/Grouse/Owls.
http://birddintur.blogspot.co.uk/
http://bird.dintur.no/default.aspx
http://wild-norway.com/archives/580
(Note Norway is expensive. A BigMac will cost around US$8.
See relative index
http://www.economist.com/blogs/g ... 12/01/daily-chart-3)
BULGARIA
1. Seems to be an up and coming bird photography place but I have no direct experience.
http://www.spatiawildlife.com/en ... hy-tours/index.html
You might be interested in this thread
http://www.birdphotographers.net ... phy-sites-in-Europe
or this professional company.
http://www.focus4nature.co.uk/en ... s-Europe/index.html
Hope this helps a little.
E
P.S Wish I had taken Kit Day’s photos but I’m not him!
I’m me!
http://www.naturetrek.co.uk/leader.aspx?id=8
With kind regards,
Eric