How to Report a Stag Beetle Sighting in the UK

In the UK, report a stag beetle sighting through the People’s Trust for Endangered Species Great Stag Hunt at ptes.org/gsh. Make a note of where and when you saw it, whether it was an adult or larva, its sex if you can tell, how many you saw, and what it was doing. A clear photo, short video, or flight audio can make the record more useful.

Why Should You Report a Sighting?

Stag beetles are an important conservation species in the United Kingdom. They need decaying wood habitat and have a limited distribution, especially in southern England. Public records help conservation groups understand where beetles still occur, where numbers may be changing, and which habitats need protection.

PTES says the Great Stag Hunt has collected records for decades and uses them to guide conservation action. A record from an expected area is useful, but so is one from an unexpected place. It adds a point to the wider picture rather than becoming just a memorable garden encounter.

Where Do You Submit the Record?

Use the online Great Stag Hunt form at ptes.org/gsh, which leads to the People’s Trust for Endangered Species reporting page. The current form accepts sighting details and lets you upload photos. PTES also asks for video or audio of adults in flight, which can help research into monitoring their characteristic flight sound.

The Great Stag Hunt form is the right destination for a normal public sighting. Do not post a precise location publicly if you are concerned about disturbance or collection. Give the conservation project the full information through its own reporting process.

What Details Should You Record?

Record the date, approximate time, and the location as accurately as you can. Note whether the beetle was on a path, wall, tree, log, lawn, road, or in flight. Count the number of individuals. If you can identify the sex, note that too. Males have large antler-like jaws, while females have much smaller jaws.

Also record the life stage. An adult is the large beetle people usually recognize. A larva is a large pale grub with an orange head and legs, usually found in damp, decaying wood or soil. If you are uncertain, say so and add a photo. Honest uncertainty is more useful than a confident wrong label.

How Do You Take a Useful Photo?

Take a photo from above that shows the entire beetle, then one from the side if possible. Include a coin, ruler, or other familiar object for scale only if you can place it without touching the beetle. A photo of the surrounding habitat can also help, especially for a larva.

Do not pick up the beetle repeatedly for photographs. Adult stag beetles have a short season for finding a mate. PTES advises leaving one where it is unless it is in immediate danger. If it is on a road or hot pavement, move it only a short distance into nearby cover.

When Is the Best Time to Look?

In the UK, adults are most often seen from late spring into summer. Males commonly fly on warm, still evenings around dusk while searching for females. Females are more often seen walking on the ground as they search for a place to lay eggs.

The Natural History Museum notes that adults are active mainly at twilight and males are often seen from mid-May to late July. The exact timing changes with weather and region, so report the actual date rather than trying to fit it into a perfect calendar window.

Should You Report a Dead Stag Beetle?

Yes, if you can identify it. A dead adult still records where the species occurred. Note its condition and location, especially if it was found on a road, near a light, in a pond, or beside a building. Those details can help show common risks in an area.

Do not remove an adult or larva from a site just to keep as a specimen. A clear photo is normally enough for a public sighting report. If a planned development may disturb known larvae or their deadwood habitat, seek advice from a qualified ecological professional.

What Happens to Your Sighting?

PTES uses biological records to help analyze distribution and guide conservation action. The project says personal details are handled separately from biological data. The public record is one part of a long-running citizen-science effort, alongside more structured stag beetle counts in some areas.

Before you submit, learn where stag beetles live so you can include useful habitat notes. The report itself is simple: observe, photograph if you can, leave the beetle safe, and send the facts while they are fresh.

Sources

• People’s Trust for Endangered Species, “Take Part in the Great Stag Hunt”
• People’s Trust for Endangered Species, “Help Wildlife Charity PTES Survey Spectacular Stag Beetles”
• People’s Trust for Endangered Species, “About Stag Beetles”
• Natural History Museum, “Stag Beetle Facts: The UK’s Largest Beetle and Where to See It”