| 2010 | Römer, U., I. Hahn & P. Vergara Description of Dicrossus foirni sp. n. and Dicrossus warzeli sp. n. (Teleostei: Perciformes), two new cichlid species from the Rio Negro and the Rio Tapajos Systems, Amazon Drainage, Brazil. In: Vertebrate Zoology , 2010, 123-138 |
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| 2010 | Vergara, P.M., I. Hahn, H. Zeballos & J. J. Armesto The importance of forest patch networks for the conservation of the Thorn-tailed Rayaditos in central Chile. . In: Ecological Research , 2010, 683-690 |
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| 2010 | Hahn, I., P. Vergara & U. Römer Vegetation structure affects bird community composition in an island ecosystem: the role of nativity and introduction. In: Geo-Öko , 2010, 10-20 |
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| 2009 | Hahn, I., U. Römer, P. Vergara & H. Walter: Diversity, biogeography and, conservation of the birds of the Juan Fernández Islands, Chile. In: Vertebrate Zoology , 2009, 103-´114 |
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| 2009 | Vergara, P. & I. Hahn Linking edge effects and patch size effects: Importance of matrix nest predators. In: Ecological Modelling , 2009, 1189-1196 |
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| 2008 | Römer, U. & I. Hahn Apistogramma barlowi spec. nov.: Description of a new facultative mouth-breeding cichlid species (Teleostei, Perciformes, Geophaginae) from Northern Peru. In: Vertebrate Zoology , 2008, 49-66 |
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| 2008 | Ingo J. Hahn: Ich war Robinson. Shaker Media, 2008 |
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| 2007 | U. Römer, I. Hahn: Climate change and changes in ecosystems: possible effects and their consequences for the biodiversity of Neotropical dwarf cichlids. Proceedings of the Biogeography Conference 8: (May 11-12, 2007), University of Erlangen. University of Erlangen, 2007. 3-4 |
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| 2007 | I. Hahn, U. Römer: Island birds as invaders and indicators of climate change in the Pacific. Proceedings of the Biogeography Conference 8: May 11-12 2007, University of Erlangen. University of Erlangen, 2007. 4-5 |
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| 2006 | Römer, U, P. Pretor, and I. Hahn: (Apistogramma huascar sp. n. - Description of a Dwarf Cichlid from Peru. . In: Römer, U. (Ed.), Cichlid Atlas 2: Natural History of South American Dwarf Cichlids. Volume 2. . Mergus-Verlag, 2006. 524--567 |
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| 2006 | U. Römer, E. Römer, D. P. Soares, I. Hahn: Apistogramma pantalone sp. n. - Description of a geophagine Dwarf Cichlid (Teleostei: Perciformes)from northern Peru. . In: U. Römer, Cichlid Atlas, Vol 2: Natural History of South American Dwarf Cichlids. . Mergus-Verlag, 2006. 636-660 |
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| 2006 | U. Römer, E. Römer, I. Hahn: Apistogramma rositae sp. n. - Description of a new Dwarf Cichlid from Peru. . In: U. Römer, Cichlid Atlas 2: Natural History of South American Dwarf Cichlids. Vol. 2. Mergus-Verlag, 2006. 662-687 |
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| 2006 | U. Römer, I. Hahn, A. Conrad: Apistogramma wapisana sp. n. - Description of a Dwarf Cichlid from Northern Brasil.. In: U. Römer, Cichlid Atlas, Vol. 2: Natural History of South American Dwarf Cichlids. Mergus-Verlag, 2006. 748-763 |
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| 2006 | Hahn, I. Bioacoustic characteristics and population numbers of endemic Cinclodes oustaleti baeckstroemii (Aves: Furnariidae) Lönnberg, 1921 of Alejandro Selkirk Island, Chile. . In: Bonner Zoologische Beiträge, 2006, 95-100 |
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| 2006 | Hahn, Ingo J.: Biogeographical isolation and bioacoustics: the Juan Fernández Firecrown Sephanoides fernandensis (Aves: Trochilidae) (King, 1831) of Robinson Crusoe Island, Chile. . In: Bonner Zoologische Beiträge, 2006, 101-103 |
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| 2006 | Hahn, Ingo J. Biogeography and ecology of the land birds of the Juan Fernández Archipelago, Chile: Landscape ecological investigations of an oceanic group of islands with comparisons to the coastal island Mocha and to the mainland along an isolation gradient. . 2006 |
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| 2006 | Ingo J. Hahn: Equilibrium theory, human impact, and biodiversity change on islands: from case studies to the global situation.. In: Verh. Ges. Ökol., 2006, 252-252 |
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| 2006 | Hahn, Ingo J. First reproductive records and nest sites of the endemic Juan Fernández Tit-tyrant Anairetes fernandezianus (Philippi 1857) (Aves: Tyrannidae) from Robinson Crusoe Island, Chile. . In: Zoologische Abhandlungen , 2006, 177 -190 |
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| 2006 | Römer, U. and I. Hahn: Ivanacara gen. n. (Perciformes, Teleostei, Cichlasomatini) ¿ a new genus cichlids from the Neotropis. In: Römer, U. (Ed.), Cichlid Atlas 2: Natural History of South American Dwarf Cichlids. Volume 2.. Mergus-Verlag, 2006. 1150-1197 |
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| 2006 | Hahn, I., U. Römer, and R. Schlatter: Population numbers and status of land birds of the Juan Fernández Archipelago, Chile. In: Senckenbergiana biologica, 2006, 109-125 |
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| 2005 | Ingo J. Hahn: Biogeography of the Avifauna fernandeziana: richness, inter-island difference, taxonomic relation, origin, and conservation status of Pacific island birds in Chile. In: Verh. Ges. Ökol., 2005, 202-202 |
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| 2005 | Hahn, I., U. Römer, and R. Schlatter: Distribution, habitat use, and abundance patterns of land bird communities on the Juan Fernández Islands, Chile. . In: Ornitología Neotropical, 2005, 371-385 |
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| 2005 | Hahn, I., U. Römer, and R. Schlatter First description of nesting ecology of the endemic Grey-flanked Cinclodes Cinclodes oustaleti baeckstroemii from the Juan Fernández Islands, Chile. . In: Acta Ornithologica
, 2005, 165-169 |
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| 2004 | U. Römer, I. Hahn, E. Römer, D. S. Soares, M. Wöhler: Apistogramma baenschi sp. n. - Description of another geophagenous dwarf cichlid (Teleostei: Perciformes) from Northern Peru. . In: Aquarium, 2004, 15-30 |
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| 2004 | Römer, U., I. Hahn, E. Römer, D. S. Soares, and M. Wöhler: Apistogramma baenschi sp. n. ¿ Description of another geophagenous dwarf cichlid (Teleostei: Perciformes) from Northern Peru. . In: Aquarium , 2004, 15-30 |
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| 2004 | I. Hahn, U. Römer, R. Schlatter: Nest sites and breeding ecology of the Másafuera Rayadito (Aphrastura masafuerae)on Alejandro Selkirk Island, Chile. In: Journal of Ornithology, 2004, 93-97 |
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| 2004 | U. Römer, I. Hahn, J. Melgar, D. S. Soares, M. Wöhler: Re-description of Apistogramma eremnopyge Ready & Kullander. In: Aquarium , 2004, 17-34 |
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| 2003 | U. Römer, I. Hahn, E. Römer, D. S. Soares, M. Wöhler: Apistogramma martini sp. n. - Description of a new species of geophagenous dwarf cichlid (Teleostei: Perciformes) from Northern Peru. In: Aquarium, 2003, 14-29 |
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| 2003 | Ingo J. Hahn, Uwe Römer, Roberto P. Schlatter: Distribution area genesis and evolution of the Rayaditos (Aves: Furnariidae): analyses towards the molecular biogeography and island ecology of Chile. In: Proc. Neotrop. Ornith. Soc. , 2003, 15, 120 |
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| 2003 | I. Hahn, M. Fernandez: Life in water: the Humboldt Penguin as master in its element.. In: Humboldt Kosmos, 2003, 9-11 |
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| 2003 | Ingo J. Hahn, Uwe Römer, Roberto P. Schlatter: Towards the island biogeography of Chile: Results from bird diversity analyses and perspectives for molecular phylogenetics. In: Verh. Ges. Ökol. , 2003, 251-251 |
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| 2002 | I. Hahn, U. Römer: Threatened avifauna of the Juan Fernandez Archipelago, Chile: the impact of introduced mammals and conservation priorities.. In: Cotinga, 2002, 66-72 |
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| 2001 | Ingo J. Hahn, Diana Wheeler: Biodiversity of a Sonoran Desert and community: systematic and functional groups. . In: Verh. Ges. Ökol. , 2001, 354-354 |
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| 2001 | Ingo J. Hahn, Miriam Fernandez, Roberto P. Schlatter, Hermann Mattes, Gerd Schulte: Community structure and habitat adaptation of the land birds of the Juan Fernández Islands, Chile (Part I). In: Verh. Ges. Ökol., 2001, 192-192 |
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| 2001 | I. Hahn, H. Mattes: Vocalisations of the Másafuera Rayadito Aphrastura masafuerae on Isla Alejandro Selkirk, Chile. In: J. Bioacoustics, 2001, 149-158 |
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