Fossil birds in the National Museum of Natural History, Sofia: composition, development and scientific value Z.N. Boev Boev, Z.N. Fossil birds in the National Museum of Natural History, Sofia: composition, development and scientific value. Zool. Med. Leiden 79-3 (4), 30-ix-2005, 35-44.— ISSN 0024-0672. Zlatozar N. Boev, National Museum of Natural History, Bulgarian Academy of Sciences, 1, Blvd. Tsar Osvoboditel, 1000 Sofia, Bulgaria (e-mail: [email protected]). Keywords: avian collections; fossil birds; Neogene-Quaternary birds; Balkan fossil record; Bulgaria; paleornithology. A review of the fossil and subfossil avian record kept in Bulgaria is presented. The only collection of fossil birds in Bulgaria was established in the 1980s. 99.6% originates from 98 localities throughout Bul- garia. Foreign fossils originate from Azerbaijan, Greece, Hungary, Namibia and New Zealand. Bulgarian avian fossil and subfossil records in collections outside the country are found in museums in France, Germany, Poland and the United Kingdom. In August 2003 the collection numbered 13,848 bones, two casts and one eggshell representing 349 taxa. Taxonomic composition includes: 22 fossil species, one fossil subspecies, one subfossil species, one subfossil subspecies and at least 160 recent species. This collection became the largest avian palaeontological collection of the Balkan during the last 15 years. Introduction Although several papers on the history and scientific value of the avian collections of the National Museum of Natural History (NMNHS) of the Bulgarian Academy of Sciences (BAS) in Sofia have been published during the last decade (Boev, 1991; 1993; 2003a; 2003b), the collections of fossil birds remained beyond special attention. They have not been mentioned in the first three papers, while Boev (2003b) only listed 17 species based on Bulgarian fossils. Some data on the NMNHS’s collections of avian fos- sil and subfossil materials are summarized in Boev (1996a – a list of preliminary identi- fied Tertiary avian discoveries until 1995), Boev (1997 – a review of the literature on the subfossil avian record until 1980) and Boev (2002 – a list of Neogene taxa, established in Bulgaria until May 2000). The present review aims to outline their acquisition and the scientific value for avian palaeontology. Historical review In comparison to other avian collections in the NMNHS, the collection of palaeon- tology has a short history. It was not in existence until the middle of the 1980s when all bird collections were without a curator. The Bulgarian archaeologist Prof. Rafail Popov collected some avian fossils from Palaeolithic, Eneolithic and Neolithic sites during his numerous excavations between 1904 and 1933 (Boev, 1997), especially in N Bulgaria. In his papers, Popov mentioned his records but his identifications were in- complete and not very precise. After his death in 1940, a part of his collection was deposited in the Archaeological Institute and Museum of the BAS in Sofia. Other parts went to the NMNHS. In 1980, we examined Popov’s samples and only 14 bones 36 Boev. Fossil birds in the National Museum of Natural History, Sofia. Zool. Med. Leiden 79 (2005) of Pyrrhocorax graculus (Linnaeus, 1766) from the Morovitsa Cave were identified. They represent a small portion of the ornitho-archaeological material collected by Prof. R. Popov, which later became lost. In the 1970s, the Bulgarian geologist Dr Ivan Nikolov from the NMNHS, received three very valuable avian samples from the Late Miocene from two coalmines (Hrabar- sko and Troyanovo) and an object from the Middle Miocene from drilling operations near Kardam village (Boev, 2002). The first two samples have been examined by Geor- gian paleontologist Prof. Dr Nikolay Burchak-Abramovich and Dr Nikolov (Burchak- Abramovich & Nikolov, 1984), while the last sample has been studied by Boev (2002). The samples are kept in the NMNHS. In the 1960s, Dr Nikolov received, for the NMNHS, an almost complete but heavily damaged skeleton of a gull, which was included in a coal slab, from the coalmines near the village of Hrabarsko. This specimen has recently been identified as Larinae gen. indet. (Boev, 2000). Bulgarian fossil and subfossil records of birds in foreign collections Several foreign ornithologists collected and examined avian fossils and subfossils from Bulgarian archaeological sites. The Polish palaeornithologist Prof. Dr Zygmunt Bochenski (Institute of Systematic & Evolution of Animals, PAS, Krakow: ISEAK) studied avian remains of the Late Palaeolithic layers of the Bacho Kiro Cave (Bochenski, 1982). Other Polish specialists from the Department of Anatomy of the Agricultural Academy in Wroclaw and Adam Mickiewicz University in Poznan respectively, examined bird remains from the Roman town “Novae” (now Swishtov) on the Danube river coast (Waluszewska-Bubien & Krupska, 1983; Makowiecki & Schramm, 1995). These collec- tions were deposited in their institutions in Poland. The same happened with the Eneolithic and Early Bronze Age avian record from Koprivets and Durankulak (Manhart, 1998). These objects entered the collections of the Faculty of Biology of the Ludwig- Maximilians University in Munich, Germany. A set of eight long bones of limbs of Chauvireria balcanica Boev, 1997, have been sent to the Earth Sciences Center of the Claude Bernard University in Lyon, France, in 1996. Three other sets of casts of holotypes described in Bulgaria have been donated to the National Museum of Natural History (Smithsonian Institution) in Washington in 1990, the ISEAK in Krakow in 1998, and the Natural History Museum in Tring in 1999. Foreign avian fossil and subfossil record in the NMNHS Very few specimens have been obtained through exchange or gifts from abroad: (1) an incomplete Late Pleistocene (Late Wurmian) skeleton composed of 50 bones of sev- eral specimens of Aegypius monachus Linnaeus, 1766, from Binagada (near Baku City); (2) an intact tarsometatarsus of Dinornithidae gen. indet. (Holocene) from an unknown locality in New Zealand; (3) a piece of eggshell of Struthioniformes gen. indet. (Lower Miocene) from Namibia (Mourer-Chauviré et al., 1996); (4) a cast of a Late Pliocene humerus of Tetrao conjugens Janossy, 1974, from Csarnota, loc. 2, Hungary (Janossy, 1976); and (5) a cast of a Ruscinian tibiotarsus of Pavo bravardi (Gervais, 1849) from Megalo Emvolon (near Thessaloniki) (Boev & Koufos, 2000). Boev. Fossil birds in the National Museum of Natural History, Sofia. Zool. Med. Leiden 79 (2005) 37 Time-scale representation The collection of fossil and subfossil birds of the NMNHS covers a time-range from the Lower Miocene (MN 2-41, ca. 20 mya; Mourer-Chauviré et al., 1996) to the subrecent time (Late Holocene, Late Medieval Age, 17th century; Boev, 1996b). See table 1. Until present, the Bulgarian avian record is known from 12 Tertiary sites, five Mi- ocene sites (one Middle Miocene and four Late Miocene), and seven Pliocene sites (four Early Pliocene and three Late Pliocene) (Boev, 2002). The Quaternary sites are much more numerous: 86 sites. The Pleistocene records originate from 18 sites (four Early Pleistocene, one Middle Pleistocene and 13 Late Pleistocene) (Boev, 2001). The Holocene record is established in 68 sites (one Ancient Holocene, five Early Holocene, 20 Middle Holocene and 42 Late Holocene) (Boev, 1999). Table 1. Geochronological distribution of the avian fossil and subfossil records in the collections of the NMNHS (after Boev, 1999; 2002; unpubl.). Period Epoch Number of objects Percentage Middle Miocene 12 0.09 Late Miocene 47 0.34 Neogene Early Pliocene 24 0.17 Late Pliocene 1973 14.24 Subtotal 2056 14.84 Early Pleistocene 74 0.53 Middle Pleistocene 36 0.26 Late Pleistocene 5820 42.02 Quaternary Ancient Holocene 4 0.03 Early Holocene 612 4.42 Middle Holocene 688 4.97 Late Holocene 4561 32.93 Subtotal 11,795 85.16 Total 13,851 100.00 Taxa representation The composition of the Neogene avian record of Bulgaria comprises of 96 taxa representing 24 families of 12 different orders (Boev, 2002). The Quaternary record is published in more details only for the Pleistocene (Early to Late) and includes 160 recent species (Boev, 2001). The subfossil record covers 125 taxa (of at least 101 species) representing 16 orders (Boev, 1996b; 1999). A considerable sample of recently collected subfossil avian material entered the museum in 2002. Over 2000 bones from four localities, which were dated Late Wurmian to the Middle Age and originating from former feeding places of the Eagle Owl (Bubo bubo (L.) from NE Bulgaria, are still under examination. The preliminary data of the dipl. biol. Ivan Mitev lists at least 95 avian taxa. Our research, assisted by Vera Hristova, in the Middle Villafranchian site near the town of Varshets (NW Bulgaria), revealed over 200 avian fossils, dated ca. 2,3 mya. These new finds are still under study. 1 MN: Mammalian Neogene zone, after Mein (1990). 38 Boev. Fossil birds in the National Museum of Natural History, Sofia. Zool. Med. Leiden 79 (2005) The types of the following 17 taxa, described by materials collected in Bulgaria, are kept in the NMNHS: Phalacrocorax serdicensis Burchak-Abr. & Nikolov, 1982; Cygnus verae Boev, 2000; Anser thraceiensis Burchak-Abr. & Nikolov, 1982; Balcanas pliocaenica Boev, 1998; Geronticus balcanicus Boev, 1998; Buteo spassovi Boev, 1998; Falco bakalovi Boev, 1998; Tetrao rhodopensis Boev, 1998; Lagopus balcanicus Boev, 1995; Chauvireria balcanica Boev, 1997; Gallinula balcanica Boev, 1999; Fulica atra pontica Boev & Karaivanova, 1998; Actitis balcanica Boev, 1998; Regulus bulgaricus Boev, 1999; Loxia patevi Boev, 1999; Coc- cothraustes simeonovi Boev, 1998; and Coccothraustes balcanicus Boev, 1998. As mentioned above, at least 160 recent species have been identified from Bulgarian Pleistocene deposits. Six species have disappeared from the recent avifauna of Bulgaria: Lagopus mutus (Montin, 1776), Lagopus lagopus (Linnaeus, 1758), Tetrao tetrix Linnaeus, 1758, Phasianus c. colchicus Linnaeus, 1758, Nyctea scandiaca (Linnaeus, 1758) and Pyr- rhocorax pyrrhocorax (Linnaeus, 1758). Another species, Perdix palaeoperdix Mourer- Chauviré, 1975, found in three sites, is fossil (Boev, 2001). Their remains are kept at the NMNHS. Part of the palaeontological material collected in Bulgaria has been referred to by foreign authors: Perdix paleoperdix Mourer-Chauviré, 1975; Pavo bravardi (Gervais, 1849); Tetrao partium (Kretzoi, 1962); Otis khosatzkii Bochenski & Kurochkin, 1987; Apus baran- ensis Janossy, 1977; Pyrrhocorax graculus vetus Kretzoi, 1962, and Corvus praecorax (De- peret, 1892). It is kept at the NMNHS. Table 2 shows that the NMNHS holds a total of 349 fossil or subfossil taxa. Its 13,851 objects constitute 46% of the avian collection of the museum (Boev, 2003b). Geographical representation The fossil and subfossil collection of the NMNHS covers Europe (Bulgaria, Greece and Hungary), Asia (Azerbaijan), Africa (Namibia) and Oceania (New Zealand). The Bul- garian fossil and subfossil records originate from 98 localities, 21 being local avifauna which provide more complete data on the palaeo-environment and 77 localities of sepa- rate avian finds, practically found all over the country. Most of the Pleistocene sites are concentrated within the Pre-Balkan Karst Area, N Bulgaria, chiefly in the NW Balkan Range. The remaining Holocene sites are scattered throughout the country, especially in lowland areas, where the prehistoric and ancient settlements were mainly spread. Trace analysis on the bird bones Some fossils are of special interest because of traces which give additional informa- tion about the cause of death or usage of the bones. These traces can be of mechanical or of thermic origin, or simple bite marks of rodents or carnivores. Exceptionally, bones were used as tools, religious objects or as ornament. Cut marks Cut marks are most frequently found on bones originating from human settlements of the Early Bronze Age to the Middle Age. Most often, these cut marks are found on bones of species which were hunted or on bones of domestic birds. For example, one ulna and two radii of Pelecanus onocrotalus Linnaeus, 1758, from the Early Bronze Age Boev. Fossil birds in the National Museum of Natural History, Sofia. Zool. Med. Leiden 79 (2005) 39 were cut and used as burners. Only 12 of the 2327 bones (0.51%) from the Roman town Nucopolis-ad-Istrum bear cut marks (Boev, 1999). Some were used as ornaments. A ring was made of the middle part of the diaphysis of a humerus of Anser sp. from Early-Iron Age of Bagachina. Distal endings of the tibiotarsi of Perdix perdix (Linnaeus, 1758), from the Palaeolithic cave Temnata Doupka were used for the elaboration of strings for neck- laces. Bones from preys of Eagle Owls Bubo bubo (Linnaeus, 1758), from most Pleis- tocene sites bear traces of claws marks. These marks are located mainly on the epiphy- ses of ossa longa tubulosa, tabula sterni and synsacrum. Gnawing and grazing marks These traces are the most frequently found marks on avian fossil and subfossil bones. Gnawing leaves clear traces on the bone surface, while grazing leaves finer su- perficial channels that do not break the bone entirely. They were caused by mustelids, domestic cats and dogs. Bird bones with gnawing and grazing marks in Nicopolis-ad- Istrum are rare, only representing 0.47% of the collection (Boev, 1999) and represent Gallus gallus (Linnaeus, 1758) (f. domestica), Tetrao urogallus Linnaeus, 1758, and Anser anser (Linnaeus, 1758). Bones from the Paleolithic to the Middle Ages show similar trac- es. A tibiotarsus of Aquila clanga Pallas, 1811 from Karnobat (6-11 century A.D.) and an ulna of Tachybaptus ruficollis ruficollis (Pallas, 1764) from Rousse (Late Holocene, un- dated) also show strong grazing marks. Burning traces The percentage of bones which show burn marks varies between 2.9% (Roman ep- och) and 20.0% (Early-Bronze Age). The bones of Gallus g. domestica, Tetrao tetrix Lin- naeus, 1758, and Otis tarda Linnaeus, 1758, most frequently show burning traces. Be- cause of the increased fragility and fragmentarity of bones which have been exposed to fire, they are rare in archaeornithological samples. Table 2. Taxa composition of the NMNHS collection of fossil and subfossil birds (subfamilies are given only for Muscicapidae and Emberizidae). Taxonomy of recent birds follows Cramp (1985, 1988, 1992), Cramp & Perrins (1993, 1994a, 1994b) and Cramp & Simmons (1977, 1980, 1983). N Taxa Number of specimens N Taxa Number of specimens Dinornithiformes Pelecanidae Dinornithidae 8. Pelecanus onocrotalus 2 1. Dinornithidae gen. indet. 1 9. Pelecanus onocrotalus/crispus 1 Struthioniformes Phalacrocoracidae Struthionidae 10. Phalacrocorax carbo 2 2. Struthionidae gen. 1 11. Phalacrocorax serdicensis 15 Gaviiformes Ciconiiformes Gaviidae Ardeidae 3. Gavia arctica 1 12. Ixobrychus minutus 3 Podicipediformes 13. Nycticorax nycticorax 1 Podicipedidae 14. Ardea purpurea 1 4. Tachybaptus ruficollis 1 15. Ardea cinerea 1 5. Podiceps grisegena 2 16. Ardea cinerea/Egretta alba 1 6. Podiceps cristatus 4 Ciconiidae 7. Podiceps nigricollis 1 17. Ciconia ciconia 2 Pelecaniformes 18. Ciconia ciconia/nigra 1 40 Boev. Fossil birds in the National Museum of Natural History, Sofia. Zool. Med. Leiden 79 (2005) 19. Ciconia sp. 1 67. Gyps fulvus 3 Threskiornithidae 68. Gyps sp. 4 20. Geronticus balcanicus 2 69. Gyps fulvus/Aegypius monachus 1 21. Threskiornitidae gen. 1 70. Aegypius monachus 51 Anseriformes 71. Aegypius sp. 2 Anatidae 72. Gypaetinae gen. 2 22. Cygnus olor 8 73. Circaetus gallicus 3 23. Cygnus cygnus 1 74. Circaetus sp. 4 24. Cygnus verae 1 75. Circus aeruginosus 1 25. Cygnus/Anser 1 76. Circus cyaneus 2 26. Anser fabalis 4 77. Accipiter gentilis 17 27. Anser albifrons 6 78. Accipiter ex gr. gentilis 1 28. Anser albifrons/fabalis 2 79. Accipiter nisus 10 29. Anser erythropus 3 80. Accipiter sp. 4 30. Anser anser 109 81. Buteo spassovi 1 31. Anser anser domestica 83 82. Buteo buteo 6 32. Anser sp. 21 83. Buteo/Pernis 1 33. Anser thraceiensis 17 84. Buteo lagopus 5 34. Branta ruficollis 2 85. Buteo lagopus/buteo 1 35. Anserini gen. 5 86. Buteo sp. – 1 2 36. Tadorna ferruginea 1 87. Buteo sp. – 2 1 37. Tadorna tadorna 5 88. Buteonini gen. 1 38. Anas penelope 18 89. Aquila pomarina 4 39. Anas strepera 7 90. Aquila clanga 2 40. Anas crecca 81 91. Aquila heliaca 1 41. Anas crecca/querquedula 10 92. Aquila chrysaetus 5 42. Anas platyrhynchos 123 93. Aquila sp. ex clanga 7 43. Anas platyrhynchos domestica 4 94. Aquila nipalensis/clanga 1 44. Anas acuta 3 95. Hieraaetus fasciatus 7 45. Anas querquedula 102 96. Hieraaetus sp. 3 46. Anas clypeata 1 97. Aquilinae gen. – 1 1 47. Anas sp. 10 98. Aquilinae gen. – 2 1 48. Balcanas pliocaenica 1 99. Accipitridae gen. 32 49. Netta rufina 6 Falconidae 50. Aythya ferina 24 100. Falco bakalovi 1 51. Aythya nyroca 14 101. Falco tinnunculus 79 52. Aythya fuligula 18 102. Falco sp. ex gr. tinnunculus – 1 25 53. Aythya sp. – 1 12 103. Falco sp. ex gr. tinnunculus – 2 11 54. Aythya sp. – 2 1 104. Falco vespertinus 10 55. Aythyni gen. 4 105. Falco subbuteo 3 56. Melanitta nigra 1 106. Falco cherrug 1 57. Bucephala clangula 1 107. Falco sp. ex gr. cherrug – 1 1 58. Bucephala clangula / Melanitta nigra 1 108. Falco sp. ex gr. cherrug – 2 6 59. Anatinae gen. – 1 170 109. Falco sp. cherrug 3 60. Anatinae gen. – 2 1 110. Falco peregrinus 1 61. Anatini gen. – 1 9 111. Falco sp. 21 62. Anatini gen. – 2 1 112. Falconidae gen. 6 63. Oxyura leucocephala 2 113. Falconiformes fam. 3 Falconiformes Galliformes Accipitridae Phasianidae 64. Pernis apivorus 1 114. Meleagris gallopavo 1 65. Haliaeetus albicilla 2 115. Meleagris gallopavo domestica 1 66. Gypaetus barbatus 4 116. Lagopus balcanicus 57 Boev. Fossil birds in the National Museum of Natural History, Sofia. Zool. Med. Leiden 79 (2005) 41 117. Lagopus lagopus 36 166. Otis tarda 14 118. Lagopus mutus/ lagopus 6 167. Otis/Tetrax 1 119. Lagopus sp. 1 168. Otididae gen. 1 120. Lagopus / Bonasa 1 Charadriiformes 121. Bonasa bonasia 19 Recurvirostridae 122. Tetrao/Lagopus 19 169. Himantopus himantopus 1 123. Tetrao partium 20 170. Recurvirostra avosetta 4 124. Tetrao rhodopensis 1 Charadriidae 125. Tetrao tetrix 313 171. Vanellus vanellus 7 126. Tetrao tetrix/urogallus 2 172. Pluvialis squatarola 1 127. Tetrao urogallus 30 173. Charadrius sp. 1 128. Tetrao sp. – 1 1 174. Charadrii fam. 5 129. Tetrao sp. – 2 13 175. Charadriidae gen. 21 130. Tetraoninae gen. 10 Scolopacidae 131. Tetraoninae/Phasianinae 12 176. Limosa limosa 4 132. Alectoris graeca 8 177. Numenius phaeopus/ tenuirostris 5 133. Alectoris sp. 4 178. Tringa totanus 10 134. Alectoris/Perdix 8 179. Tringa stagnatilis 4 135. Perdix perdix 287 180. Tringa nebularia 5 136. Perdix perdix/palaeoperdix 14 181. Tringa ochropus 1 137. Perdix palaeoperdix 209 182. Tringa glareola 3 138. Perdix sp. 28 183. Tringa sp. 5 139. Perdix/Coturnix 2 184. Actitis balcanica 1 140. Coturnix coturnix 206 185. Actitis hypoleucos 1 141. Chauvireria balcanica 1160 186. Tringinae gen. 1 142. Chauvireria sp. 56 187. Scolopax rusticola 1 143. Perdicinae gen. 2 188. Gallinago media 2 144. Gallus gallus domestica 2844 189. Gallinago gallinago 1 145. Gallus/Phasianus 71 190. Philomachus pugnax 5 146. Phasianus colchicus 79 191. Scolopacidae gen. 8 147. Phasianus sp. 1 Laridae 148. Pavo bravardi 4 192. Larus canus 4 149. Pavo cristatus 1 193. Larus ridibundus 3 150. Phasianidae gen. 25 194. Larus sp. 7 Gruiformes 195. Larus/Sterna 4 Gruidae 196. Larinae gen. 1 151. Grus grus 4 197. Chlidonias sp. 1 Rallidae 198. Gelochelidon nilotica 1 152. Rallus aquaticus 31 199. Sterna hirundo 6 153. Crex crex 54 200. Sterna sp. 5 154. Porzana parva 1 Columbiformes 155. Porzana pusilla 3 Pteroclididae 156. Porzana porzana 5 201. aff. Pteroclididae gen. 1 157. Porzana porzana/pusilla 1 Columbidae 158. Porzana sp. 1 202. Columba livia (incl. domestica) 103 159. Gallinula balcanica 1 203. Columba oenas 8 160. Gallinula chloropus 26 204. Columba livia/oenas 2 161. cf. Gallinula sp. 1 205. Columba palumbus 12 162. Fulica atra 165 206. Columba sp. – 1 1 163. Rallidae gen. 4 207. Columba sp. – 2 5 Otididae 208. Streptopelia turtur 24 164. Tetrax tetrax 14 209. Streptopelia decaocto 5 165. Otis khosatzskii 5 210. Streptopelia sp. – 1 2 42 Boev. Fossil birds in the National Museum of Natural History, Sofia. Zool. Med. Leiden 79 (2005) 211. Streptopelia sp. – 2 1 249. Eremophila alpestris 4 212. Columbiformes fam. 2 250. Alaudidae gen. – 1 1 Cuculiformes 251. Alaudidae gen. – 2 8 Cuculidae Hirundinidae 213. Cuculus canorus 1 252. Delichon urbica 5 Strigiformes 253. Hirundo daurica 14 Strigidae 254. Hirundo rustica 5 214. Otus scops 4 255. Riparia riparia 2 215. Bubo bubo 3 256. Ptyonoprogne rupestris 2 216. Nyctea scandiaca 2 257. Ptyonoprogne rupestris/Riparia riparia 14 217. Surnia ulula 1 Motacillidae 218. Glaucidium passerinum 1 258. Anthus sp. – 1 2 219. Athene noctua 34 259. Anthus sp. – 2 3 220. Athene/Aegolius 1 260. Anthus trivialis 7 221. Strix aluco 37 261. Motacilla flava 1 222. Strix aff. nebulosa 1 262. Motacilla sp. 1 223. Asio otus 21 Laniidae 224. Asio otus/flammeus 20 263. Lanius collurio 9 225. Asio flammeus 63 Bombycillidae 226. Aegolius funereus 6 264. Bombycilla garrulus 2 227. Aegolius sp. 2 Cinclidae 228. Aegolius / Athene 1 265. Cinclus cinclus 1 229. Strigiformes fam. 1 Prunellidae Caprimulgiformes 266. Prunella modularis 1 Caprimulgidae Muscicapidae 230. Caprimulgus europaeus 2 Turdinae Apodiformes 267. Erithacus megarhynchos 1 Apodidae 268. Erithacus rubecula 4 231. Apus baranensis 9 269. Erithacus sp. 2 232. Apus melba 104 270. Oenanthe oenanthe 2 233. Apus apus 14 271. Monticola saxatilis 4 Coraciiformes 272. Turdus torquatus 1 Meropidae 273. Turdus merula 31 234. Merops apiaster 1 274. Turdus sp. ex gr. merula 2 Coraciidae 275. Turdus pilaris 1 235. Coracias garrulus 1 276. Turdus iliacus 4 Piciformes 277. Turdus philomelos 16 Picidae 278. Turdus sp. ex gr. philomelos 3 236. Picoides minor 4 279. Turdus viscivorus 6 237. Picoides major 2 280. Turdus sp. – 1 5 238. Dryocopus martius 1 281. Turdus sp. – 2 2 239. Non-Passeriformes indet. 1 282. Turdinae gen. 2 Passeriformes Sylvinae Alaudidae 283. Cettia cetti 1 240. Melanocorypha sp. – 1 2 284. Sylvia atricapilla 1 241. Melanocorypha sp. – 2 2 285. Sylvia communis 1 242. Galerida sp. – 1 1 286. Sylvia sp. 1 243. Galerida sp. – 2 3 287. Phylloscopus sibilatrix 1 244. Galerida sp. – 3 2 288. Regulus bulgaricus 1 245. Lullula arborea 9 289. Sylviinae gen. 1 246. Lullula sp. 5 Muscicapinae 247. Alauda arvensis 14 290. Ficedula albicollis 1 248. Alauda sp. 4 291. Muscicapinae gen. 3 Boev. Fossil birds in the National Museum of Natural History, Sofia. Zool. Med. Leiden 79 (2005) 43 Paridae 320. Passer sp. 1 292. Parus major 3 321. Passer/Fringilla 1 293. Parus ex gr. major 2 322. Petronia petronia 1 294. Parus sp. – 1 1 Sturnidae 295. Parus sp. – 2 2 323. Sturnus roseus 1 296. Parus sp. – 3 2 324. Sturnus sp. 3 Sittidae 325. Sturnus vulgaris 11 297. Sitta europaea 2 326. Sturnidae gen. 1 298. Sitta sp. 1 Oriolidae Emberizidae 327. Oriolus oriolus 1 Corvidae Emberizinae 328. Garrulus glandarius 43 299. Emberiza sp. – 1 5 329. Pica pica 65 300. Emberiza sp. – 2 1 330. Pica sp. 7 Fringillidae 331. Nucifraga caryocatactes 7 301. Fringilla coelebs 8 332. Nucifraga sp. 1 302. Fringilla montifringilla 1 333. Pyrrhocorax graculus 717 303. Fringilla sp. 11 334. Pyrrhocorax graculus/pyrrhocorax 1 304. Carduelis carduelis 1 335. Pyrrhocorax graculus/Corvus monedula 4 305. Carduelis chloris 1 336. Pyrrhocorax pyrrhocorax 19 306. Carduelis sp. – 1 1 337. Pyrrhocorax sp. – 1 5 307. Carduelis sp. – 2 12 338. Pyrrhocorax sp. – 2 3 308. Acanthis cannabina 6 339. Corvus corax 40 309. Loxia curvirostra 9 340. Corvus corone 46 310. Loxia patevi 5 341. Corvus frugilegus 39 311. Pyrrhula pyrrhula 9 342. Corvus frugilegus/corone 23 312. Pyrrhula sp. 3 343. Corvus monedula 360 313. Carduelinae gen. 5 344. Corvus monedula / Pyrrhocorax graculus 32 314. Coccothraustes balcanicus 1 345. Corvus cf. praecorax 1 315. Coccothraustes coccothraustes 4 346. Corvus sp. – 1 9 316. Coccothraustes simeonovi 6 347. Corvus sp. – 2 7 317. Fringillidae gen. 9 348. Corvidae gen. 477 Ploceidae 349. Passeres fam. 367 318. Passer domesticus 4 Aves indet. 3400 319. Passer montanus 1 Total 13851 References Bochenski, Z., 1982. Aves.— In: J. Kozlowski, (ed.). 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