Peter Schwarz/ BIA / Yellow Crab Spider (Thomisus onustus) camouflaged on flower, Dalmatia, Croatia

Marko Matesic/ BIA / Ferruginous Duck (Aythya nyroca) pair on pond, Krk, Croatia

Marko Matesic/ BIA / Ferruginous Duck (Aythya nyroca), Krk, Croatia

Ralph Martin/ BIA / European Goldfinch (Carduelis carduelis) male, Croatia

Peter Schwarz/ BIA / Marsh Fritillary (Euphydryas aurinia) butterfly, Dalmatia, Croatia

Peter Schwarz/ BIA / Marsh Fritillary (Euphydryas aurinia) butterfly, Dalmatia, Croatia

Peter Schwarz/ BIA / Marsh Fritillary (Euphydryas aurinia) butterfly, Dalmatia, Croatia

Peter Schwarz/ BIA / Spotted Fritillary (Melitaea didyma) butterfly, Dalmatia, Croatia

Peter Schwarz/ BIA / Eastern Bath White (Pontia edusa) butterfly, Dalmatia, Croatia

Peter Schwarz/ BIA / High Brown Fritillary (Argynnis adippe) butterfly, Dalmatia, Croatia

Peter Schwarz/ BIA / Black-veined White (Aporia crataegi) butterfly, Dalmatia, Croatia

Marko Matesic/ BIA / Zitting Cisticola (Cisticola juncidis), Istria, Croatia