A status is
not a census.

Four numbers.
Four different questions.

FAO’s Domestic Animal Diversity Information System, DAD-IS, provides tools for national breed populations, population histories and risk monitoring. Its geographic structure matters: a national population record cannot automatically be presented as a global total. A published figure must keep its country, year, definition and source attached.

For Conservation Legacy, a useful population report should explain what was counted, how it was counted and what remains outside the count. A registry total may include deceased animals. A farm survey may miss owners who did not respond. An estimate can be useful while still having uncertainty. These limitations are part of the evidence, not reasons to replace the figure with a guess.

Our editorial rule is simple: do not graph unlike measurements as though they form one continuous trend. Compare registrations with registrations and dated censuses with comparable dated censuses. If a method changes, mark that change in the report.

Sources: FAO population-data tools and risk-status monitoring.

Family. Genus. Species.
Then the domestic population.

Taxonomy describes relationships among organisms. The Natural History Museum explains the hierarchy used to organize that information, including kingdom, phylum, class, order, family, genus and species. The familiar two-part scientific name identifies genus and species; a domestic breed name describes a different level of identity.

Our scientific records retain the naming authority and the reference used. The table below is a checked snapshot of exact matches returned by GBIF’s taxonomic service. It does not imply that every breed hall contains only one species. The cattle hall includes domestic yak, and domestic goose history involves more than one ancestral species.

Taxonomic databases can differ in their handling of domestic forms. Preserve the treatment used by each authority instead of making several different names appear to be the same claim. Equally, an occurrence map shows recorded observations or specimens; it is not automatically a census of registered domestic breeding animals.

IUCN assessments describe extinction risk for the assessed taxon. A wild ancestor’s assessment and a domestic breed’s conservation category need their own records. They should not be merged simply because the animals share a scientific name or an evolutionary history.

Sources: Natural History Museum: taxonomy · IUCN assessment explanations · GBIF records linked individually above.

Preserve the record.
Keep its time and place.

An old herdbook, a photograph and a modern genomic study answer different kinds of questions. A historical document can show what people called a population, where it was kept and what work it performed. It may also contain assumptions or husbandry practices that later evidence has changed.

The Biodiversity Heritage Library holds livestock and breed literature, including Walter Gilbey’s Farm stock 100 years ago, published in 1910. Such works can help reconstruct agricultural memory. They should be read as historical sources, with author and publication date visible—not used automatically as current veterinary instructions.

That distinction also guides the use of older encyclopedias and multimedia references. An edition of Encarta or Grolier may preserve a valuable educational account, but its date still matters. A library catalogue establishes that a work exists; it does not establish that we have read the full book or verified a claim inside it.

Our own articles should bring those records into a readable story while keeping the route back to the evidence. Photographs need identified animals and lawful reuse. Oral histories need attribution and context. A powerful image earns its place by helping the reader understand the population, rather than merely decorating a page.

Historical research reference: BHL livestock-breed holdings.