Moon-bill

Weight

680 g – 730 g

Length

Not recorded

Lifespan

20.4 years

Diet

Herbivore

Main food

Not recorded

Habitat

wetland

Egg incubation

26.8 days

Young per litter or clutch

9

Age at maturity

12 months

Litters or clutches a year

1

Lifestyle

Aquatic

Migration

Migratory

Conservation status

Not recorded

Countries on record

Not recorded

Not recorded

No conservation assessment is recorded for this species in our sources. That is not the same as being safe: it has not been matched to an assessment.

1. kingdomAnimalia
2. phylumChordata
3. classAves
4. orderAnseriformes
5. familyAnatidae
6. genusAythya
7. SpeciesAythya collaris (Donovan, 1809)

Synonyms Anas collaris, Fuligula collaris, Fuligula rufitorques, Fulix collaris, Marila collaris, Nyroca collaris

Catalogue of Life

LC, Least Concern

Tufted duck

Aythya fuligula

Anatidae

VU, Vulnerable

Common pochard

Aythya ferina

Anatidae

NT, Near Threatened

Ferruginous duck

Aythya nyroca

Anatidae

LC, Least Concern

Greater scaup

Aythya marila

Anatidae

R

Raft duck

Aythya affinis

AnatidaeNo free photo yet

B

Baer's pochard

Aythya baeri

AnatidaeNo free photo yet

CompareMoon-bill vs Tufted duckMoon-bill vs Common pochardMoon-bill vs Ferruginous duckMoon-bill vs Greater scaup

• An amniote life-history database to perform comparative analyses with birds, mammals, and reptiles · CC0 1.0 · E096-269
  Myhrvold, N.P., Baldridge, E., Chan, B., Sivam, D., Freeman, D.L. & Ernest, S.K.M. (2015) An amniote life-history database to perform comparative analyses with birds, mammals, and reptiles. Ecology 96: 3109. https://doi.org/10.1890/15-0846R.1. Data: https://doi.org/10.6084/m9.figshare.3563457.v1
• AmphiBIO, a global database for amphibian ecological traits · CC BY 4.0 · v1
  Oliveira, B.F., São-Pedro, V.A., Santos-Barrera, G., Penone, C. & Costa, G.C. (2017) AmphiBIO, a global database for amphibian ecological traits. Scientific Data 4: 170123. https://doi.org/10.1038/sdata.2017.123. Data: https://doi.org/10.6084/m9.figshare.4644424.v5
• AVONET: morphological, ecological and geographical data for all birds · CC BY 4.0 · v7
  Tobias, J.A. et al. (2022) AVONET: morphological, ecological and geographical data for all birds. Ecology Letters 25: 581–597. https://doi.org/10.1111/ele.13898. Data: https://doi.org/10.6084/m9.figshare.16586228.v7
• Catalogue of Life eXtended Release · CC BY 4.0 · 2026-10-16 XR
  Catalogue of Life (2026). Catalogue of Life eXtended Release, version 2026-10-16 XR. Catalogue of Life Foundation, Amsterdam, Netherlands. https://doi.org/10.48580/dgzlf
• Wikimedia Commons · per file (CC0 / public domain / CC BY green, CC BY-SA amber, anything else not displayed) · 2026-11-11
  Wikimedia Commons contributors. Wikimedia Commons. https://commons.wikimedia.org (each file credited to its author under its own licence).
• EltonTraits 1.0: species-level foraging attributes of the world's birds and mammals · CC0 1.0 · 1.0
  Wilman, H., Belmaker, J., Simpson, J., de la Rosa, C., Rivadeneira, M.M. & Jetz, W. (2014) EltonTraits 1.0: Species-level foraging attributes of the world's birds and mammals. Ecology 95: 2027. https://doi.org/10.1890/13-1917.1. Data: https://doi.org/10.6084/m9.figshare.3559887.v1
• Wikidata · CC0 1.0 · 2026-11-11
  Wikidata contributors. Wikidata. https://www.wikidata.org (data retrieved via the Wikidata Query Service).
• Wikipedia (English) · CC BY-SA 4.0 · 2026-11-11
  Wikipedia contributors. Wikipedia, The Free Encyclopedia. https://en.wikipedia.org (text under CC BY-SA 4.0; each block names its article and revision).

@misc{moon_bill_2026,
  title = {Moon-bill (Aythya collaris)},
  author = {{CreatureData}},
  year = {2026},
  url = {https://creaturedata.com/animals/moon-bill},
  note = {Data as of 2026-11-11}
}