With summer approaching, I am keeping an eye out to
protect stag beetles and their larvae in Mayow Park. In May, June and July stag beetles will
start to emerge from decaying wood under the ground where they have been tunnelling through as larvae.
Mayow Park has been a hotspot for these magnificent
creatures but numbers have declined in recent years through a number of factors
including damage to their habitat, being dug up by predators, caught by cats
and crushed by cars on our roads. They are clumsy flyers and end up falling to
the ground.
Male stag beetle (lucanus cervus) from London Wildlife Trust |
London wildlife Trust has an advice note about stag beetles (lucanus
cervus)
http://www.wildlondon.org.uk/sites/default/files/files/Stag%20beetle%20advice%20note.pdf for anyone wanting to learn more.
These creatures are detrivores, eating their way through decaying wood
and helping to create new soil. The larvae bore through decaying wood underground for up to seven years before
changing into the stag beetles that we all recognise. You can tell them from similar
looking larvae: lesser stag beetle larvae feed on decaying wood above ground
and cockchafer larvae live on living roots.
The PTES charity has produced an ID guide to different, but
similar-looking larvae http://ptes.org/wp-content/uploads/2014/06/Larvae-ID.pdf
stag beetle larvae in their characteristic curled pose https://ptes.org/campaigns/stag-beetles/ |
The female stag beetle looks similar to the lesser stag beetle (dorcus parallelipipedus) http://www.wildlifetrusts.org/species/lesser-stag-beetle as they both have pincer-like jaws that can nip your finger. Significantly it is all black where lucanus cervas is a dark-brown/ black. Dorcus is far more widespread and can be found across England and Wales.
Stag beetles are protected in
the UK under the Wildlife and Countryside Act 1981. They are classified as a
priority species in the UK Biodiversity Action Plan.
Here a summary of information
from London Wildlife Trust
·
You are most likely to find a stag beetle near or on dead wood
·
It's between 5cm and 8cm long
·
It's got large antler shaped jaws
a) The male's jaws are
very large
b) The female's jaws
are smaller but more powerful
·
Adults emerge from the soil beneath logs or tree stumps from mid-May til
late July
·
Males are often seen flying on sultry summer evenings an hour or two
before dusk
So let's all be aware of these special invertebrates and help them to thrive once more in Mayow Park.