| Cettia janossyi Kessler, 2013 † | |
| Cettia kalmani Kessler, 2013 † | |
| Cinclus minor Kessler, 2013 † | |
| Cinclus gaspariki Kessler, 2013 † | |
| Coccothraustes major Kessler, 2013 † | |
| Delichon major Kessler, 2013 † | |
| Delichon polgardiensis Kessler, 2013 † | |
| Delichon pusillus Kessler, 2013 † | |
| Emberiza gaspariki Kessler, 2013 † | |
| Emberiza media Kessler, 2013 † | |
| Emberiza pannonica Kessler, 2013 † | |
| Emberiza parva Kessler, 2013 † | |
| Emberiza polgardiensis Kessler, 2013 † | |
| Erithacus minor Kessler, 2013 † | |
| Fringilla kormosi Kessler, 2013 † | |
| Fringilla petenyii Kessler, 2013 † | |
| Galerida pannonica Kessler, 2013 † | |
| Hippolais veterior Kessler, 2013 † | |
| Hirundo gracilis Kessler, 2013 † | |
| Hirundo major Kessler, 2013 † | |
| Lanius capeki Kessler, 2013 † | |
| Lanius hungaricus Kessler, 2013 † | |
| Lanius intermedius Kessler, 2013 † | |
| Locustella janossyi Kessler, 2013 † | |
| Locustella kordosi Kessler, 2013 † | |
| Locustella magna Kessler, 2013 † | |
| Loxia csarnotanus Kessler, 2013 † | |
| Lullula minor Kessler, 2013 † | |
| Lullula minuscula Kessler, 2013 † | |
| Lullula parva Kessler, 2013 † | |
| Luscinia denesi Kessler, 2013 † | |
| Luscinia pliocaenica Kessler, 2013 † | |
| Melanocorypha minor Kessler, 2013 † | |
| Monticola pongraczi Kessler, 2013 † | |
| Motacilla intermedia Kessler, 2013 † | |
| Motacilla minor Kessler, 2013 † | |
| Motacilla robusta Kessler, 2013 † | |
| Muscicapa miklosi Kessler, 2013 † | |
| Muscicapa petenyii Kessler, 2013 † | |
| Oenanthe kormosi Kessler, 2013 † | |
| Oenanthe pongraczi Kessler, 2013 † | |
| Oriolus beremendensis Kessler, 2013 † | |
| Parus medius Kessler, 2013 † | |
| Parus parvulus Kessler, 2013 † | |
| Parus robustus Kessler, 2013 † | |
| Passer hiri Kessler, 2013 † | |
| Passer minusculus Kessler, 2013 † | |
| Passer pannonicus Kessler, 2013 † | |
| Phoenicurus baranensis Kessler, 2013 † | |
| Phoenicurus erikai Kessler, 2013 † | |
| Phylloscopus pliocaenicus Kessler, 2013 † | |
| Phylloscopus venczeli Kessler, 2013 † | |
| Pinicola kubinyii Kessler, 2013 † | |
| Plectrophenax veterior Kessler, 2013 † | |
| Prunella freudenthali Kessler, 2013 † | |
| Prunella kormosi Kessler, 2013 † | |
| Pyrrhula gali Kessler, 2013 † | |
| Pyrrhula minor Kessler, 2013 † | |
| Regulus pliocaenicus Kessler, 2013 † | |
| Riparia minor Kessler, 2013 † | |
| Saxicola baranensis Kessler, 2013 † | |
| Saxicola lambrechti Kessler, 2013 † | |
| Saxicola magna Kessler, 2013 † | |
| Saxicola parva Kessler, 2013 † | |
| Sitta gracilis Kessler, 2013 † | |
| Sitta pussila Kessler, 2013 † | |
| Sitta villanyensis Kessler, 2013 † | |
| Sturnus baranensis Kessler, 2013 † | |
| Sturnus brevis Kessler, 2013 † | |
| Sturnus pliocaenicus Kessler, 2013 † | |
| Sylvia intermedia Kessler, 2013 † | |
| Sylvia pussila Kessler, 2013 † | |
| Tichodroma capeki Kessler, 2013 † | |
| Troglodytes robustus Kessler, 2013 † | |
| Turdicus pannonicus Kessler, 2013 † | |
| Turdus major Kessler, 2013 † | |
| Turdus medius Kessler, 2013 † | |
| Turdus minor Kessler, 2013 † | |
| Turdus miocaenicus Kessler, 2013 † | |
| Turdus polgardiensis Kessler, 2013 † | |
| Lanius major Kessler, 2013 † | |
| Acrocephalus kordosi Kessler, 2013 † | |
| Acrocephalus kretzoii Kessler, 2013 † | |
| Acrocephalus major Kessler, 2013 † | |
| Acrocephalus minor Kessler, 2013 † | |
| Aegithalos congruis Kessler, 2013 † | |
| Aegithalos gaspariki Kessler, 2013 † | |
| Alauda tivadari Kessler, 2013 † | |
| Anthus baranensis Kessler, 2013 † | |
| Anthus hiri Kessler, 2013 † | |
| Bombycilla brevia Kessler, 2013 † | |
| Bombycilla kubinyii Kessler, 2013 † | |
| Calandrella gali Kessler, 2013 † | |
| Carduelis kretzoii Kessler, 2013 † | |
| Carduelis lambrechti Kessler, 2013 † | |
| Carduelis medius Kessler, 2013 † | |
| Carduelis parvulus Kessler, 2013 † | |
| Certhia immensa Kessler, 2013 † | |
