Friday, January 1, 2016

Up Yours, Titmice!

Delighted to report that all six larvae I've been following in the wild survived December, and were present and correct on Jan 1st (there may be one or two more which I haven't yet located in hibernation).  

This is good news as tit predation tends to be high during mild winter weather, and low during severe cold - but perhaps larvae were protected to some extent by December's excessive rain.  


It appears that tit predation is relatively low in years when larvae are scarce, as is the case now.  

Interesting that two of the six had moved position, one by a staggering 2m.  This tallies with mass movement recorded during the mild December of 2013, when I was following a much larger number of larvae.  However, none of the larvae which woke up and moved during the 2013-14 winter actually survived into the spring.

Here are some photos from today:- 


This one has stayed put, and is close to swelling green buds.

The one above has moved to a shady position up stem, in a lesion, from a terminal leaf bud exposed to sun.  My guess is that it might move again.


There were two here, head to head, but one (No 14, below) moved 2m to a leader bud. 






Interesting that this larva was grey-green but has changed colour to match its new background. 




This one's a cracker, grey on grey.  It's unusual to find one on dead wood. 




Finally, here's one in a classic position.



We are seriously overdue a good summer, and this year is 40 years on from the long hot summer of 1976, the ultimate butterfly summer of modern times.  The last good summer we had was ten years ago, in 2006 - 30 years on from the long hot summer.  So, jack in the job, sell the children into slavery, send the spouse off to the mother-in-law's and go Emperoring - the long hot summer's returning...


Thursday, December 24, 2015

MERRY CHRISTMAS


Still feeding my adults on Christmas day. Continual rearing certainly appears to be a possibility for these species. MERRY CHRISTMAS everyone.

Saturday, December 5, 2015

Shock Horror!

Purple Emperor larvae resent each other's presence almost as much as adult males, so I was amazed to find two hibernating next to each other in Safernoc (ancient spelling of Savernake) today.  Not the greatest of photos but it was too windy for photography -


Here's a wider view -


I was also surprised to find one hibernating a fair way along a dead branch, only the second time I've found one hibernating off a live branch (out of about 120 wild hibernating larvae) -


And here's a nice bicoloured larva, indicating just how chameleon-like they can be -


Wednesday, November 25, 2015

Sallow leaf damage

How likely is this leaf damage (on a fallen sallow) to have been made by Purple Emperor, or could it be any of numerous species of Lepidoptera - the location is Epping Forest, Essex? We are still trying, in a lazy kind of way, to find our first larva. Thanks, Liz & Andrew

Monday, November 9, 2015

Conking out...

Over the weekend (7th & 8th Nov) I watched a larva entering hibernation, at Knepp Wildlands in West Sussex. 

He (named 'Raymond') had been photographed fully coloured up on an about-to-fall leaf on Thurs 6th, by Penny Webb, Knepp's ecologist -


Then, mid-morning on the 7th I found him slowly crawling about some 30cm away, on a different twig system, in driving rain.  He then conked out here, in pre-hibernation mode -


Then, mid-morning on the 8th he was found back near his old feeding spray, which had fallen off.  After observing the Act of Remembrance, it being Remembrance Day, he spent 30 minutes spinning a loose silk pad on the stem next to a prominent bud (the 4th bud from the spray tip), then he conked out on the pad, hopefully for five long months, to dream of spring...  Here's him spinning - 


And here's him conked - 


And here's a wider view of his location, a typical hibernation spot -


Now, if only I could conk out for the next five months...

Tuesday, November 3, 2015

Full House


Every single one of the following photos was taken today 03.11.15

Freshly laid ova (3rd generation):

Ova about to hatch (3rd generation):

L1 larvae (3rd generation):

L2 larva (3rd generation):

L3 larva (3rd generation):

Diapausing L3 larva (2nd generation):

Fresh L4 larva (3rd generation):

Fully grown L5 larva (2nd generation):

Pupae (2nd generation):

Imago's (2nd generation):

Paired imago's (2nd generation):

As my 3rd generation L3 larvae have failed to diapause, I am hoping to ascertain if it is now possible to continually rear this species. For those interested to learn more, please send me Facebook friend request:

https://www.facebook.com/irisscientist

Monday, November 2, 2015

Into Hibernation...

Good to find one larva in hibernation in Savernake yesterday -


Most are still on the leaves, colouring up -


Every year I hope for cold, wet weather at the start of November, so that larvae don't wander far before conking out, and I can find them easily ...  but every autumn we get ridiculously mild weather precisely then, and larvae wander far and wide...  Cross.