Alopochen aegyptiaca (Linnaeus, 1766)

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English Egyptian goose Status LU: established.
Lëtzebuergesch Nilgäns 1 Status EU: established. IAS of EU concern (2017).
Français Ouette d’Égypte RA: ISEIA: B3, Watch List. Harmonia+: n/a.
Deutsch Nilgans Wikipedia: Wikipedia - English - Egyptian goose Wikipedia - Français - Ouette d'Égypte Wikipedia - Deutsch - Nilgans Wikipedia - Nederlands - Nijlgans | Wikispecies: Wikispecies - Alopochen aegyptiaca | CABI
Nederlands Nijlgans Back to the list of vertebrates

Brief description

Adult-and-egyptian-geese-chicksAlopochen aegyptiaca (Linnaeus, 1766) is found in a diversity of wetlands, usually supplied with a belt of trees or shrubs. The species seems to be in strong expansion, Belgium is one example. During the nesting period, it develops aggressive behaviour leading to nest usurpation and decrease of offspring number in several bird species (see also Konter 2015), namely herons and raptors. Post-breeding flocks are responsible for overgrazing and for the alteration of banks and quality of water bodies (Anselin et al. 2010).

IAS of Union concern

In 2017,  the Egyptian goose was added to the list of invasive alien species of Union concern (Anonymous 2017) which implies that member states shall take all necessary steps to prevent it’s unintentional introduction or spread.

Status and distribution in Luxembourg

Records of Alopochen aegyptiaca L. in Luxembourg. Data source: Recorder-Lux, iNaturalist & GBIF, 2020-07-07.

Alopochen aegyptiaca (Linnaeus, 1766) was first documented by R. Gloden in late December 1984 on the Moselle in Bech-Kleinmacher, municipality of Schengen (MNHNL, iNaturalist & GBIF 2020). The first successful breeding attempt took place in 2007 in the nature conservation area, Haff Réimech, near Remerschen (Bastian 2016: 7). Some 20 to 30 breeding couples can now be observed every year. Outside of the breeding season, the species can be seen in large numbers on rivers or stagnant waters (Lorgé & Melchior 2015).

Today the species is widespread in the country. It occurs less often north of the Sure river (Bastian 2016: 13) although a small population of 3 individuals were observed on the Our lake during summer and autumn 2016 (Ries 2016, own observation). A recent survey estimates the actual breeding population as a total of 39 breeding couples (Bastian 2016: 13).

Currently, 1194 records of the Egyptian goose in Luxembourg are accessible through the MNHNL-mdata portal (MNHNL, iNaturalist & GBIF 2020).

Risk assessment

ISEIA protocol

B3 (3+3+2+1) = Watch List (Ries et al. 2014: 199). Confirmed by new assessment on 15 May 2018 by Patrick Lorgé, Christian Ries & Manou Pfeiffenscheider.

Harmonia+ protocol

Not assessed yet.

Worldwide distribution

Fact sheet

PDF fact sheet of the Nature and Forestry Administration: FR | DE


  • Anders, C., 2017. Erfassung der Bestände von Kanadagans (Branta canadensis) und Nilgans (Alopochen aegyptiaca) im Jahr 2016 im Großherzogtum Luxemburg. Regulus Wissenschaftliche Berichte 32: 12-19.
  • Anonymous, 2017. Commission implementing regulation (EU) 2017/1263 of 12 July 2017 updating the list of invasive alien species of Union concern established by Implementing Regulation (EU) 2016/1141 pursuant to Regulation (EU) No 1143/2014 of the European Parliament and of the Council. Official Journal of the European Union L 182: 37-39 (13.7.2017).
  • Anselin, A., E. Branquart, K. Devos, J.-Y. Paquet, D. Strubbe, D. Vangeluwe & A. Weiserbs, 2010. Harmonia database: Alopochen aegyptiaca (Linnaeus, 1766). Harmonia version 1.2, Belgian Forum on Invasive Species. URL: [accessed 2020-04-22]
  • Bastian, M., 2016. Kanadagans (Branta canadensis) und Nilgans (Alopochen aegyptiaca) in Luxemburg. Bericht zur Erfassung der Kanadagans und der Nilgans im Jahr 2016 zur Untersuchung der Verbreitung, der Bestände sowie der Bestandsentwicklung im Großherzogtum Luxemburg. Centrale ornithologique Luxembourg, natur&ëmwelt a.s.b.l., Kockelscheuer. 21 p.
  • Biver, G., 2013. Waterbird count – recensement hivernal des oiseaux d’eau 2009-2012. Regulus Wissenschaftliche Berichte 28: 43-58.
  • CABI, 2019. Alopochen aegyptiaca (Linnaeus, 1766). In: Invasive Species Compendium. Wallingford, UK: CAB International. URL: [accessed 2020-04-22]
  • Konter, A., 2015. Die weitere Entwicklung der Wasservogelwelt an der Sauer unterhalb von Steinheim in den Jahren 2012-2014. Regulus Wissenschaftliche Berichte 30: 1-34.
  • Konter, A. & P. Lorgé, 2009. Vorkommen und Brut von Kanada- Branta canadensis (Linné 1758) und Nilgans Alopochen aegyptiacus (Linné 1766) in Luxemburg. Regulus wissenschaftliche Berichte 24: 49–54.
  • Lorgé, P. & E. Melchior, 2015. Vögel Luxemburgs, natur&emwelt, ISBN: 978-2-919920-01-3, 9. Ausgabe, 273 pp.
  • MNHNL, iNaturalist & GBIF, 2020. Alopochen aegyptiaca (Linnaeus, 1766) in MNHNL-mdata, online portal combining species observation from Recorder-Lux, iNaturalist and GBIF. National Museum of Natural History, Luxembourg. URL: [accessed 2020-04-22]
  • Ries, C., M. Pfeiffenschneider, Engel, E., J.-C. Heidt & M. Lauff, 2014. Environmental impact assessment and black, watch and alert list classification after the ISEIA Protocol of vertebrates in Luxembourg. Bull. Soc. Nat. luxemb. 115: 195-201. [PDF 247 KB]
  • Weis, Jean, 2015. Liste der Luxemburger Vogelnamen. Regulus Wissenschaftliche Berichte 29 (2014): 69-79. [PDF 1.1 MB]

 Page content last updated on 2020-04-28. Last proofread by Caroline Grounds on 2019-11-27.