Monday, 2 May 2016

Speckled Wood, pupa to butterfly 2016

Life cycle of the Speckled Wood continued.

After finding a suitable place to pupate, a stem of grass, twig etc., the larva will make a cremaster which it attaches itself to by a series of tiny hooks that are attached to it's abdomen. Hanging upside down for the duration of the pupal stage.

Final instar Speckled Wood larva, stayed like this for five days
before it finally started to pupate.  27th November 2015
The first stage of the transition from larva to pupa is to me the most beautiful of all the pupal stages. The pupa is filled with substance like, a transparent liquified  jelly with a hardened membrane/skin outer casing.


The first stage of the Speckled Wood pupa, 1st December 2015
The pupa changed again six days later, which was it's final change until the Spring and will overwinter at this pupal stage.

The Speckled Wood pupa overwintered at this stage, 7th December 2015
In the Spring, normally April [in this case April 20th 2016] the pupa starts to change after about four months of lying dormant over the winter months, as the butterfly within the pupa starts to develop.

 The first pupal change for four months, 20th April 2016
The changes within the pupa are slow to begin with and, five days later the pupa has taken on a totally new appearance.

The Speckled Wood pupa five days later, 25th April 2016
The changes in the appearance of the pupa are now appearing more frequently, nearly daily.  26th April 2016

Speckled Wood pupa's 5th change, [since the 1st December 2015] 26th April 2016
28th April 2016 Two days later, the 4th change of the pupal appearance of the Spring

Took slightly longer for this change, at two days
29th April 2016 The following day it's appearance has changed again as the wing colours/marking become more apparent.

Now its back to one for each pupal change, this being it's 7th pupal change
30th April 2016 Again the next day, the pupa has taken up a slightly different appearance even though there is no change to the wing coloration, the abdomen/body is a slightly darker green

30th April 2016 and just a small change in the Abdomen coloration
1st May 2016 The final day as a pupa and, the final pupal change as the butterfly becomes fully developed within the pupa.

The 9th and final pupal change
And finally, four days short of eight months, [from the day the ovum was laid to the butterfly emerging] a female Speckled Wood emerges into the world.

A beautiful female Speckled Wood butterfly successfully
making the long journey into adulthood, 2nd May 2016
And what a stunner she is, as she completes the task of drying out before flying away......

Monday, 25 April 2016

Comma, Life Cycle


 Female Commas normally lay there ovum [eggs] on the edge of Nettle leaves and are fairly easy to find but, can be mistaken for a Red Admiral's ovum,  [who also lay their ovum on Nettle leaves and, sometimes on the edge of the leaf] as both are very much alike. The contents of the ovum are green when first laid. Then after about 8 days the contents turn a light greenish yellow and eventually you can see the tiny larva through the skin/membrane of the ovum at least 24 hours before the larva emerges, as the membrane/skin of the ovum is transparent. There are 2 broods.
Comma ovum after about 8 eight days, now a light
greenish yellow in colour
Comma ovum after 12 days, the tiny larva  is quite visible
through the transparent membrane/skin of the ovum
This stage can last anywhere between about 12-21 days depending on the weather conditions, hot, cold etc.

On the 13th day, this particular larva emerged, [the time scale for emerging larva does vary].

A newly emerged 1st instar larva
Once the larva have emerged they make their way to the back of the Nettle leaf, where they eat and rest-up,  right up to the stage of the 3rd instar larva.

2nd instar Comma larva on the back of a Nettle leaf
Once they reach the 4th and 5th instar larva they become more exposed.

Final instar Comma larva
The larval stage lasts about 3 weeks, [but does vary in both broods] and there are 5 instars  [4 moults] with the 1st brood in the Spring, and 4 instars [3 moults] with the 2nd brood in the summer. When the final instar larva is ready to pupate it will find a suitable stem, twig etc and, make a Cremaster which it will attach itself to with a number of tiny hooks at the bottom of it's abdomen, hanging up-side down.
 Final instar Comma larva ready for pupation
This particular stage lasted 10 days, but the weather was extremely warm for this particular pupa, and the period of pupation can last longer.

Comma pupa, the butterfly emerged after 10 days, but this does vary
When the butterfly eventually emerges it can take a couple of hours before he/she to completely dry out and, be able to fly.

The 1st brood are most likely to produce the Aberration Hutchinsoni which normally emerge late June, early July.
Comma, female ab. Hutchinsoni
 Comma showing the upper side of it' wings
Comma showing the undersides of it's wings

Monday, 18 April 2016

Orange-tip female on purple..

Female Orange-tip taken in my garden

Purple Hairstreak 1st instar caterpillar

 The ovum, [eggs] of the Purple Hairstreak are laid just below an Oak leaf bud in the Summer and overwinter at this stage.
Purple Hairstreak ovum
The larva emerge in the Spring, early April.

April 2nd the tiny larva has just started to eat it's way out 
After the tiny 1st instar larva hatch they normally eat their way into a leaf bud where it feeds completely hidden, but this is not always the case. As you can see in the following photos.

This 1st instar larva has just emerged [first day, April 3rd] and already started to eat it's
way into a leaf bud
By the second day the 1st instar purple Hairstreak larva has taken on a totally new appearance
and, in this case has chosen to feed/live on the outside of the Oak leaf bud instead of being
concealed with-in the bud
This 1st instar Purple Hairstreak larva at 6 days has changed in appearance again and,
will stay like this until it's first moult when it will become a 2nd instar larva
After the first moult the 2nd, 3rd and 4th instars all feed in the open, but are very difficult to locate.

Saturday, 16 April 2016

Silver-washed Fritillary ovum

 The female Silver-washed Fritillary normally lays her ovum [eggs] on the north facing side of a moss covered trunk of an Oak Tree, about 60cm of the ground. The larva emerge after 3 weeks and after eating the empty egg, immediately bury themselves deep down in a small hole/crevice in the Bark of the Tree and then spin a silk pad,  that they overwinter in. Emerging in the Spring.
Freshly laid Silver-washed Fritillary ovum
Silver-washed Fritillary ovum after 2 weeks
This Silver-washed Fritillary ovum has been
sucked dry

Tuesday, 5 April 2016

A beautiful Blue

Male Common Blue 3rd August 2015

The emergence of 2 hibernating Butterflies [rescued]

I found a small Tortoiseshell last November [2015] flying about my kitchen when i arrived home from work. So after catching it, without causing any damage to this fragile insect i placed it in a small container which, i then placed in the fridge so it could hibernate through the winter months safely. Over four months later at the beginning of April when the temperature was suitable for the butterfly to be flying [about 14 degrees centigrade] i released the Small Tortoiseshell in my garden on a lovely warm Spring day. I carefully placed it on a small stick, at first it just sat there with it's wings closed.

Small Tortoiseshell just out of hibernation  taking in the warmth of the sun
But eventually the butterfly spread it's wings open, drowning in the warmth of the sun and, furiously vibrating its wings, just the same way a Bee will, to warm it's body to the correct temperature and so enable it to fly. Between 6-7 minutes later the Small Tortoiseshell took it's first flight for over four months and disappeared into the Surrey countryside.

The Small Tortoiseshell just before taking it's first flight for over 4 months
A male Peacock was rescued from a building that was being demolished a couple of months ago near to my home by Keith a friend of mine who gave me the butterfly for safe keeping. So again i place the butterfly in a small container, and again popped in my fridge until Spring. It was released on the same day as the Small Tortoiseshell, [Saturday, 2nd April 2016]. I placed the opened container in a lovely sunny position in the garden.

The male Peacock half in, half out of the container it spent the last couple of months in, in my fridge
taking in he warm comforting rays of the sun before successfully fly away
Again the Peacock opened it's wings after a couple of minutes and began like the Small Tortoiseshell, furiously vibrating it's out stretched wings, building it's body temperature up. Then again after 6-7 minutes it too flew away.