Going on an egg hunt

Early January doesn’t have a lot of butterflies or moths flying around, well not many that can be easily found so when I saw a plea for help from the Warwickshire branch of Butterfly Conservation to count some eggs of the Brown hairstreak I thought I’d lend a hand.

The egg hunt was organised by the Brown Hairstreak Champion for the area: my wife asked how they pick a champion – “Is it the person who finds the most eggs?”. I like to think that that may be the way it’s done but I suspect volunteering and getting picked by a committee might be somewhat closer to the truth.

The hunt took place at Ryton Pools Country Park, a Warwickshire council park that is reasonably near my house. This is the only place in Warwickshire that there is a record of a colony of this butterfly, it’s pretty scarce in this county.  I’d not been to the park before so it was nice to see another local attraction and hopefully some eggs too– I’ll definitely be back.

How do you find a Brown Hairstreak egg? Imagine the proverbial needle in a haystack. Well your fairly close, it may well be harder – you need to find something the size of a pin head in a 100 acre country park! Luckily you can narrow that down to Blackthorn as that’s where the females lay the eggs. Once you find the Blackthorn you’ve got a chance of finding the eggs.

The butterfly places the eggs on relatively young growth on the blackthorn, it seems to like suckers and places the eggs at the junction of new growth, see picture (not one of mine sadly). You have to examine the blackthorn from bottom to about head height, checking both sides and hopefully you’ll find some. To give you some idea of how scarce they are I spent five hours doing this and didn’t find any!

Luckily I got to see some I was shown what to do by some much more experienced people who do this regularly. They showed me some they had found earlier and they found another eight or so eggs whilst I was there. No beginners luck for me this time.

In case you are wondering… the person who found the most eggs was the current West Midlands Champion, maybe my wife was right!