Data Sources

Where our data comes from and how we use it

MAPPPD v4.4

The Mapping Application for Penguin Populations and Projected Dynamics (MAPPPD) is our primary source for colony-level data. Operated by the Scientific Committee on Antarctic Research (SCAR) through the Antarctic Biodiversity Informatics subcommittee (AntOBIS), MAPPPD provides the most comprehensive database of penguin colony locations, population counts, and trend assessments available.

  • Coverage: Emperor, Adélie, chinstrap, gentoo, macaroni, and king penguins (6 species, 920+ colonies)
  • Data types: Colony coordinates, population counts, survey years, count methods, trend assessments
  • License: CC-BY 4.0 — data is free to use with attribution
  • Access: penguinmap.com

MAPPPD data is updated as new surveys become available. Our IceFlow pipeline fetches the latest data daily, ensuring colony information stays current. Note that many colonies have not been surveyed in years — the "latest count" shown reflects the most recent available data, which may be several years old.

IUCN Red List

The International Union for Conservation of Nature (IUCN) Red List of Threatened Species provides conservation status assessments for all 18 penguin species. These assessments are conducted by BirdLife International, which serves as the IUCN's official authority on bird conservation status.

  • Categories used: Least Concern (LC), Near Threatened (NT), Vulnerable (VU), Endangered (EN), Critically Endangered (CR)
  • Assessment frequency: Varies by species; some haven't been re-assessed since 2018
  • Access: iucnredlist.org

We display the most recent IUCN assessment for each species. Assessment years are noted on species pages where available. Population figures come from the IUCN assessment unless more recent data is available from MAPPPD.

BirdLife International

BirdLife International is the world's largest nature conservation partnership, serving as the IUCN Red List authority for birds. They maintain range maps, population estimates, and conservation assessments for all penguin species.

  • Contribution: IUCN status assessments, global population estimates, range descriptions
  • Access: birdlife.org

Wikipedia and Wikimedia Commons

Species photographs and general descriptions are sourced from Wikimedia Commons and Wikipedia. Each image includes attribution with a link to the original source file and license information.

  • Photo license: Varies by image (typically CC-BY or CC-BY-SA) — see individual photo credits
  • Wikipedia: Used for general species descriptions and factual background; all content is verified against primary sources

Methodology

Colony data: MAPPPD colony records include coordinates, species, latest count, survey year, and trend assessment. Our IceFlow pipeline processes this data daily, calculating trend summaries and formatting it for display. Trend assessments (stable/declining/critical/unknown) come directly from MAPPPD's analysis.

Population estimates: When MAPPPD provides colony-level counts, we aggregate them by species. IUCN and BirdLife population estimates are used for species not tracked by MAPPPD. Where sources disagree, we note the discrepancy.

IUCN status: Conservation statuses are sourced from IUCN Red List assessments. Assessment years are shown on species pages. We update these as new assessments are published.

Joel's notes: Personal observations and opinions are clearly labeled as such. They represent the views of this project's creator and are separate from scientific data.

Citation Requirements

If you use data from PenguinWatch, please cite the original sources:

  • MAPPPD data: Humphries, G.R.W., Naveen, R., Schwaller, M., Che-Castaldo, C., McDowall, P., Schrimpf, M., & Lynch, H.J. (202X). Mapping Application for Penguin Populations and Projected Dynamics (MAPPPD). penguinmap.com. CC-BY 4.0.
  • IUCN data: IUCN Red List of Threatened Species. iucnredlist.org. Version as assessed (year noted on each species page).
  • BirdLife data: BirdLife International. birdlife.org.

PenguinWatch itself is a data aggregation and presentation tool. We don't produce original research — we make existing research more accessible. Always verify data against primary sources for scientific or policy use.