Do Four-spotted Chasers chase off Broad-bodied Chasers?

A few days ago Dean asked whether Broad-bodied Chasers were able to co-exist with Four-spotted Chasers.

In the unpolluted high quality National Pond Survey sites – which are our most natural ponds – these two species were found in 15% and 20% of sites respectively: so both pretty widespread.

But although both species were found at getting on for a fifth of all good quality ponds in England, Wales and Scotland we only rarely found them together – in fact in only two locations of those we surveyed. So it looks as though they are not often found breeding at the same site.

Whether Broad-bodied Chaser chase off Four-spots I’m not sure: males are quite territorial, so it’s not impossible. However, it’s also likely that there are differences in habitat preferences of larvae with Broad-bodied Chasers clearly happy in very new ponds.

In Abingdon, we’ve so far only found Broad-bodied Chasers in the garden ponds.

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3 Responses to “Do Four-spotted Chasers chase off Broad-bodied Chasers?”

  1. Katie Says:

    We mostly get Four-spotted Chasers at our pond, though Broad-bodieds also turn up every year. When the two are present at the same time, Four-spotteds seem to win the dogfights.

    • Jeremy Biggs Says:

      Hi Katie

      That’s interesting. I seem to remember your pond is quite natural – not such a formal garden pond, and quite rural? Or am I thinking of somewhere else?

      Jeremy

  2. Katie Says:

    Hi Jeremy

    It’s not very formal, I suppose… maybe I mean not very tidy! But yes, it’s very rural – arable fields just the other side of the fence, and parkland just the other side of a minor road.

    We dug it in June 2008 and it’s been one of the best things I’ve ever done.

    Loads of blog posts about it here: http://bogbumper.blogspot.com/search/label/garden%20pond

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