Cetti's warbler Aves Sylviidae Cettia cetti
Cirl bunting Aves Emberizidae Emberiza cirlus
Coal tit Aves Paridae Parus ater
Coal tit Aves Paridae Periparus ater
Colias croceus Insecta Pieridae Colias croceus
Common blackbird Aves Turdidae Turdus merula
Common buzzard Aves Accipitridae Buteo buteo
Common chaffinch Aves Fringillidae Fringilla coelebs
Common chiffchaff Aves Phylloscopidae Phylloscopus collybita
Common crane Aves Gruidae Grus grus
Common cuckoo Aves Cuculidae Cuculus canorus
Common firecrest Aves Regulidae Regulus ignicapilla