Picture credits

Providers of pictures:

Fotolia:
ant236, Bernard, Cyrano, Eric Isselée, dani kreienbühl, nyul, Doreen Salcher, schweitzer-degen

I-Stock photo:
Serafim Nenarokov, Vicki Reid, Lorraine Swanson, Dane Wirtzfeld

Plainpicture:
alt-6, Erickson, Fancy, Andreas Körner, Pictorium, Westend61

sxc:
Adamci, Christopher Bailey, Piotr Bizior, Eszter, GoFish, Ilco, Henk Leerssen, Jonathan Ng, Kifir, mordoc, morcomm, Michal Osinski, Svyatoslav Palenyy, Maja Petric, Max Somma, Teodora Vlaicu, Fernando Weberich, Peter Werner, Nick Winchester