I'm glad you like the shots Wurzel. If you’ve never, ever seen one before you need to add it to your bucket list

. They are truly incredible, formidable creatures (they spit formic acid at you when they are upset!!

) .... but you need not worry about my commitment to butterflies. I have seen and photographed 44 species of butterfly this season (so far) and I am just filling in time, waiting for the Wall Browns and Silver studded Skippers to appear. I finished my last post with a Peacock as they are very much on my mind at the moment. Back in June (ages ago), I saw 2 nests of Peacock cats, both of which I believed had been predated. (It was later suggested that they might have just been old moulted skins). However, a third nest appeared healthy and so that it wouldn’t suffer the same fate, I snipped a couple of nettle leaves off the main plant, together with the attached cats, and put them on nettles in a cage at home. This is where it all started:

This time I was determined not to become emotionally attached to them, and apart from the protection of the mesh they were left outside to face the elements and they were not counted or monitored closely, except to ensure they had a good food supply. I took the occasional photo and admired them as they grew. Just for fun some serious effects of 'hand shake' when taken in dull conditions with a slow shutter speed:
I shouldn't laugh - I used to take photos like this

This was the size of the cats less than a week ago - fully grown:
..... and then they started to pupate. I have never seen a cat pupate before. Within the space of about 24 hours, almost as one, they hung themselves up in various places. Some chose the nettle leaves but many chose the roof of the cage. Some were suspended in a straight line, others adopted a curved posture like this:
Sadly, the first one I watched had become detached and was lying on the floor of the cage. His skin had split in places and the green casing of the pupa showed through. I gently placed him on a leaf and watched as his little body contracted and convulsed, trying to remove the outer skin. How I wanted to help him

. I thought that perhaps he was struggling as he had no contact point to brace himself against – it was so tempting to try somehow to hang him up again but I feared that if I interfered I would only make matters worse. I did not know what was normal as I had never seen this before but when droplets of liquid began to emerge from his body where the skin had split I feared the worst.
Sadly, he didn’t make it but just a couple of minutes later, another cat which was hanging in the cage started his transformation. I was transfixed – it was just like someone had ‘unzipped’ him as in a very short space of time his skin had split open to reveal the pupa and the old skin was shrugged off.
The brilliant green outer casing rapidly faded to either a duller green or a greyish colour, the latter being more numerous and applied solely to those hanging off the roof of the cage. Another panic set in! Had I done something wrong and killed them? A quick look at this site reassured me that there can be 2 different colours but I wonder what this depends on. Temperature (ie the height at which they pupate) or light (those under the leaves stayed green).
Anyway, the upshot is that if I am lucky, in a few weeks I shall have Peacock butterflies adorning every corner of the garden. For now, a few shots of the cats in various stages of pupation, although all but a couple have pupated now.