A breeding bird survey in the Istranca (Yıldız) mountains of Turkish Thrace seawards to the Black sea was conducted May–August 2009. Eighty-eight days of field work in 697 locations generated novel breeding evidence for several species. The survey provided the first certain evidence of Wood Warbler Phylloscopus sibilatrix breeding in Turkey. Strong evidence for breeding of Yellowhammer Emberiza citrinella, with a relatively widespread distribution, was also gathered. The survey suggested that Green Sandpiper Tringa ochropus, which was not considered to be a breeding bird in Turkey, probably breeds in the study area. Moreover, breeding evidence was gathered for Garden Warbler Sylvia borin, Baillon’s Crake Porzana pusilla, Stock Dove Columba oenas, Icterine Warbler Hippolais icterina and Common Rosefinch Carpodacus erythrinus for the first time in Turkish Thrace. Furthermore, the survey provided some breeding evidence for Great Cormorant Phalacrocorax carbo, European Shag P. aristotelis, Pygmy Cormorant P. pygmeus, Garganey Anas querquedula, Common Redshank Tringa totanus, Alpine Swift Apus melba, Eurasian Wryneck Jynx torquilla, Red-rumped Swallow Cecropis daurica, White-throated Dipper Cinclus cinclus, Sardinian Warbler Sylvia melanocephala, Barred Warbler Sylvia nisoria and Red-breasted Flycatcher Ficedula parva, which require further research on their breeding distributions in the study area.