Bauer, H.-G.: Ploceus melanocephalus Black-headed Weaver. In: European Breeding Bird Atlas 2: Distribution, Abundance and Change, p. 780 - 780 (Eds. Keller, V.; Herrando, S.; Voříšek, P.; Franch, M.; Kipson, M. et al.). European Bird Census Council & Lynx Edicions, Barcelona (2020)

Bauer, H.-G.: Rhodopechys sanguineus Eurasian Crimson-winged Finch. In: European Breeding Bird Atlas 2: Distribution, Abundance and Change, p. 832 - 832 (Eds. Keller, V.; Herrando, S.; Voříšek, P.; Franch, M.; Kipson, M. et al.). European Bird Census Council & Lynx Edicions, Barcelona (2020)

Bauer, H.-G.: Rhodospiza obsoleta Eurasian Desert Finch. In: European Breeding Bird Atlas 2: Distribution, Abundance and Change, p. 835 - 835 (Eds. Keller, V.; Herrando, S.; Voříšek, P.; Franch, M.; Kipson, M. et al.). European Bird Census Council & Lynx Edicions, Barcelona (2020)

Bauer, H.-G.: Syrmaticus reevesii Reeves's Pheasant. In: European Breeding Bird Atlas 2: Distribution, Abundance and Change, p. 81 - 81 (Eds. Keller, V.; Herrando, S.; Voříšek, P.; Franch, M.; Kipson, M. et al.). European Bird Census Council & Lynx Edicions, Barcelona (2020)

Bauer, H.-G.: Threskiornis aethiopicus African Sacred Ibis. In: European Breeding Bird Atlas 2: Distribution, Abundance and Change, p. 252 - 252 (Eds. Keller, V.; Herrando, S.; Voříšek, P.; Franch, M.; Kipson, M. et al.). European Bird Census Council & Lynx Edicions, Barcelona (2020)

Bauer, H.-G.: Vidua macroura Pin-tailed Whydah. In: European Breeding Bird Atlas 2: Distribution, Abundance and Change, p. 783 - 783 (Eds. Keller, V.; Herrando, S.; Voříšek, P.; Franch, M.; Kipson, M. et al.). European Bird Census Council & Lynx Edicions, Barcelona (2020)

Bauer, H.-G.; Aghababyan, K.: Emberiza hortulana Ortolan Bunting. In: European Breeding Bird Atlas 2: Distribution, Abundance and Change, pp. 866 - 867 (Eds. Keller, V.; Herrando, S.; Voříšek, P.; Franch, M.; Kipson, M. et al.). European Bird Census Council & Lynx Edicions, Barcelona (2020)

Bauer, H.-G.; Aghababyan, K.: Emberiza melanocephala Black-headed Bunting. In: European Breeding Bird Atlas 2: Distribution, Abundance and Change, pp. 866 - 867 (Eds. Keller, V.; Herrando, S.; Voříšek, P.; Franch, M.; Kipson, M. et al.). European Bird Census Council & Lynx Edicions, Barcelona (2020)

Bauer, H.-G.; Franch, M.: Apendix 1 (b): Native species recorded or mentioned in EBBA1 but not recorded in EBBA2. In: European Breeding Bird Atlas 2: Distribution, Abundance and Change, pp. 883 - 884 (Eds. Keller, V.; Herrando, S.; Voříšek, P.; Franch, M.; Kipson, M. et al.). European Bird Census Council & Lynx Edicions, Barcelona (2020)

Bauer, H.-G.; Franch, M.: Apendix 1: Rare species. In: European Breeding Bird Atlas 2: Distribution, Abundance and Change, pp. 881 - 883 (Eds. Keller, V.; Herrando, S.; Voříšek, P.; Franch, M.; Kipson, M. et al.). European Bird Census Council & Lynx Edicions, Barcelona (2020)

Bauer, H.-G.; Franch, M.: Appendix 2: Rare non-native species recorded during EBBA2. In: European Breeding Bird Atlas 2: Distribution, Abundance and Change, pp. 884 - 909 (Eds. Keller, V.; Herrando, S.; Voříšek, P.; Franch, M.; Kipson, M. et al.). European Bird Census Council & Lynx Edicions, Barcelona (2020)

Bauer, H.-G.; Klaus, S.: Tetraogallus caspius Caspian Snowcock. In: European Breeding Bird Atlas 2: Distribution, Abundance and Change, p. 72 - 72 (Eds. Keller, V.; Herrando, S.; Voříšek, P.; Franch, M.; Kipson, M. et al.). European Bird Census Council & Lynx Edicions, Barcelona (2020)

Bauer, H.-G.; Ottens, G.: Branta hutchinsii Cackling Goose. In: European Breeding Bird Atlas 2: Distribution, Abundance and Change, p. 105 - 105 (Eds. Keller, V.; Herrando, S.; Voříšek, P.; Franch, M.; Kipson, M. et al.). European Bird Census Council & Lynx Edicions, Barcelona (2020)

Bauer, H.-G.; Shitikov, D.A.: Iduna caligata Booted Warbler. In: European Breeding Bird Atlas 2: Distribution, Abundance and Change, p. 606 - 606 (Eds. Keller, V.; Herrando, S.; Voříšek, P.; Franch, M.; Kipson, M. et al.). European Bird Census Council & Lynx Edicions, Barcelona (2020)

Boston, E. S. M.; Dechmann, D. K. N.; Ruczynski, I.: Leisler’s Noctule Nyctalus leisleri (Kuhl, 1817). In: Handbook of the Mammals of Europe (Eds. Hackländer, K.; Zachos, F. E.). Springer, Cham (2020)

Boston, E. S. M.; Dechmann, D. K. N.; Ruczynski, I.: Leisler's Noctule Nyctalus leisleri (Kuhl, 1817). In: Handbook of the Mammals of Europe - Chiroptera (Eds. Hackländer, K.; Zachos, F. E.). Springer, Cham (2020)

Braun, M.P.; Bauer, H.-G.: Psittacula eupatria Alexandrine Parakeet. In: European Breeding Bird Atlas 2: Distribution, Abundance and Change, p. 532 - 532 (Eds. Keller, V.; Herrando, S.; Voříšek, P.; Franch, M.; Kipson, M. et al.). European Bird Census Council & Lynx Edicions, Barcelona (2020)

Dechmann, D. K. N.; Ruczynski, I.: Azorean bat Nyctalus azoreum (Thomas, 1901). In: Handbook of the Mammals of Europe - Chiroptera (Ed. Hackländer, K.). Springer, cham (2020)

Herrando, S.; Milanesi, P.; Brotons, L.; Franch, M.; Bauer, H.-G.; Villero, D.; Mor´n-Ordónez, A.; Kéry, M.; Vořížek, P.; Keller, V.: Methods. In: European Breeding Bird Atlas 2: Distribution, Abundance and Change, pp. 23 - 39 (Eds. Keller, V.; Herrando, S.; Voříšek, P.; Franch, M.; Kipson, M. et al.). European Bird Census Council & Lynx Edicions, Barcelona (2020)

Javakhishvili, Z.; Bauer, H.-G.: Carpodacus rubicilla Great Rosefinch. In: European Breeding Bird Atlas 2: Distribution, Abundance and Change, p. 826 - 826 (Eds. Keller, V.; Herrando, S.; Voříšek, P.; Franch, M.; Kipson, M. et al.). European Bird Census Council & Lynx Edicions, Barcelona (2020)