The UK species list, drawn as charts

The charts below break the UK species list down group by group, from mammals and birds to the fungi and insects that make up most of it.

Counted from the list

What the UK species list holds

Each bar counts species names on the Natural History Museum's UK Species Inventory. These are not counts of animals or plants in the wild, and they do not show change over time: each chart says what it counted.

The biggest groups on the UK species list Most of the UK's species are small and rarely noticed: fungi, insects, tiny animals and algae.
Fungi 14,551 species verified 2026-10-04
Bees, wasps and ants 8,123 species verified 2026-10-04
True flies 7,403 species verified 2026-10-04
Flowering plants 6,100 species verified 2026-10-04
Beetles 4,314 species verified 2026-10-04
Crustaceans 3,776 species verified 2026-10-04
Moths 2,722 species verified 2026-10-04
Mites and ticks 2,452 species verified 2026-10-04
Algae 2,370 species verified 2026-10-04
Diatoms 2,359 species verified 2026-10-04

Counted from the Natural History Museum's UK Species Inventory, the release of August this year, loaded on 2 October. Every bar is a count of species names on that list, not of animals or plants in the wild.

The groups people know best, on the same scale Drawn against the same longest bar as the fungi above, so the difference in size is real.
Birds 1,223 species verified 2026-10-04
Bony fish 634 species verified 2026-10-04
Land mammals 119 species verified 2026-10-04
Butterflies 90 species verified 2026-10-04
Sea mammals 42 species verified 2026-10-04
Reptiles 35 species verified 2026-10-04
Amphibians 31 species verified 2026-10-04

Counted from the Natural History Museum's UK Species Inventory, the release of August this year, loaded on 2 October. Every bar is a count of species names on that list, not of animals or plants in the wild.

Native or brought here Species the list marks as not native to the UK, against the rest.
Native to the UK 68,068 species verified 2026-10-04
Non-native, brought to the UK 6,897 species verified 2026-10-04

Counted from the Natural History Museum's UK Species Inventory, the release of August this year, loaded on 2 October. Every bar is a count of species names on that list, not of animals or plants in the wild.

Where they live A species can belong to more than one of these, so the bars add up to more than the whole list.
On land or in fresh water 56,982 species verified 2026-10-04
In the sea 11,744 species verified 2026-10-04
In fresh water 5,625 species verified 2026-10-04

Counted from the Natural History Museum's UK Species Inventory, the release of August this year, loaded on 2 October. Every bar is a count of species names on that list, not of animals or plants in the wild.

Names in the UK's languages Most species have only a scientific name. These are the ones with an everyday name as well.
With an English name 14,606 species verified 2026-10-04
With a Welsh name 6,330 species verified 2026-10-04
With a Gaelic name 525 species verified 2026-10-04

Counted from the Natural History Museum's UK Species Inventory, the release of August this year, loaded on 2 October. Every bar is a count of species names on that list, not of animals or plants in the wild.

What these numbers mean

A list of names, not a count of animals

Each chart here is built from the UK species list kept by the Natural History Museum, the list that recorders use as the standard reference for what has been named in this country. A name on the list means a species has been formally described and recorded here at some point. It does not tell you how many of that animal, plant or fungus are alive now, and it says nothing about whether a species is thriving or in trouble. For that, you need a trend.

Why the small things dominate the chart

Most of the names on the list belong to fungi, insects and other small life that rarely gets a second glance on a walk. Birds, mammals and the other groups most people think of as "wildlife" make up a small slice of the whole. The list looks the way it does because that is genuinely how UK life is divided up.

What counts as native here

The list flags the species that were brought to the UK by people, deliberately or otherwise. Every other name on the list is treated as native for this purpose. That is a working definition, and it is worth keeping in mind when you read the native and non-native bars side by side.

Where to go next

  • Look up any one of these species, by name or by group, on the Species Finder.
  • See how UK wildlife as a whole is faring against the trends and targets that are actually measured, on How Is It Going.