Make a pitfall trap

Try out a new technique for finding insects with HOPE Learning Officer, Kate.

Have you found any interesting insects lately?  Along with the other HOPE Learning Officers, I have been out and about in Oxfordshire schools where we have found some fantastic insects.  Among my recent favourites is the thick-legged flower beetle, Oedemera nobilis

These beautiful beetles are distinctive with their stunning emerald-green colour and their chunky thighs which are seen only in the males.   We have also found lots of varied species of ladybird including cream spot, 14-spot and eyed ladybirds. Generally, we collect insects using sweep nets and beating trays but, of course, you might be lucky enough to find some interesting insects just by looking in the right places.  Under stones, logs, leaves, in amongst long grass or on flowers are all excellent places to start.  Insects, however, are very good at hiding so why not make a pitfall trap? This can be a great way to find a range of insects, particularly ground beetles.

Here are the written instructions.

You will need: 

  • A small pot such as a clean yoghurt pot
  • A trowel for digging
  • A few stones
  • A small piece of wood or a flat stone to act as a rain cover

What to do:

  1. Find a good spot for your trap on level ground, amongst vegetation.
  2. Dig a hole big enough to sink your pot so that it is completely level with the ground.
  3. Place the pot into the hole. You can put a few leaves, small stones and twigs in the pot to make any insects you catch feel at home.
  4. Build a cover over the trap by placing stones around the pot and resting a flat stone or piece of wood on top.  Make sure there is enough space for insects to crawl under.  This will stop the pot filling with water if it rains.
  5. Wait for a few hours or, better still, overnight.
  6. When you are ready, empty your pot carefully into a tray so you can see what has fallen in.  Take photos so that you can have a go at identifying what you have caught.
  7. Remember to check your pitfall trap every day and return any creatures carefully to a sheltered spot in vegetation.

We would love to know what you find! Let us know by commenting below or by using the Contact Us page.  Happy insect collecting!

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