copplestone1's picture

Water bug _MG_9629

Observed: 18th June 2011 By: copplestone1copplestone1’s reputation in Invertebrates
Species interactions

No interactions present.


Fenwickfield's picture


Sorry I should have said that it was nymph stage.


RoyW's picture

Larva/nymph ID

This may be a B-b Chaser larva, but I don't think that the photo shows enough to be sure.
Based on visible features I would leave the ID as a Libellula/Orthetrum species.

Sarah West's picture

Amazingly, dragonfly larvae

Amazingly, dragonfly larvae spend up to 5 years living in ponds, eating virtually any other creatures it can, before emerging as a dragonfly, then it only lives for 4-6 weeks!

Sarah West
OPAL Community Scientist
Yorkshire and Humber

RoyW's picture

Dragonfly lifecycles

Dragonflies tend to develop slower as larva when they are in colder water or do not have much food available. This means that larva of species like Golden-ringed Dragonflies, which may live in mountain streams, can take 5-7 yearsto reach maturity.
Other species may reach maturity and emerge as adults in only a couple of months (eg. Red-veined Darter, which can have two generation in a year even in the UK).
In some species the adults live far longer than 4-6 weeks, even over wintering in the adult form(eg. the Common Winter Damselfly, which is widespread on the continent).

Fenwickfield's picture


It was on the TV about this last night,and about reintroducing some species which have become extinct,not sure if I agree with that.


RoyW's picture


The species referred to is the White-faced Darter, which has been reintroduced to some sites in Cumbria following restoration of habitat.
Reintroduction projects have to be considered on an individual basis with careful consideration of the reasons for the original decline, the likelihood of sucess, and the potential effect on other species.

Reintroductions may be up for debate, but broadly speaking I believe that unless you are against all reintroductions it is unreasonable to have an objection in a specific case without being able to say why (and I realise that in the above comment you said that you were uncertain of your opinion).

Personally I support reintroductions where; (i) the cause of the original decline is known and is no longer present, (ii) the habitat is suitable, (iii) natural recolonisation is unlikely.