Butterfly Islands: July

Showing posts with label July. Show all posts

Saturday 12 August 2023

A Day Moth & a Night Moth.

I am not into moths but today this Garden Tiger Moth was seen resting at the base of my garage wall. It is such a handsome creature that it deserves a post on this blog. It is of course a night flying moth unlike the other photo which shows a Jersey Tiger Moth feeding on Hemp-agrimony. This species of Day flying moth is quite common here in July and August.

Monday 26 June 2017

Dark Green Fritillaries On Speed.

With the season generally over two weeks early this year I made a first visit to West High Down in the hope of seeing a Chalk-hill Blue.I have not yet recorded this blue earlier than in the month of July and I was optimistic of a June sighting.Alas no Chalk-hill Blue today and with an unsettled and rainy forecast for the rest of the week I think that it will be July again for this last remaining blue of the season.

Nevertheless another butterfly of our downland is on the wing now,the Dark Green Fritillary. These large fritillaries spent most of their time flying at high speed across our downs,only briefly stopping it seems, for a quick top up on the Giant Thistle flowers that are scattered about.In fact at the moment there seems to be very few Giant Thistle flowers in bloom so getting any sort of view of this butterfly is limited.

Tuesday 20 June 2017

Early Return for White-letter Hairstreaks.

This year the season seems to be at least two weeks early and many of the summer species are on the wing sooner than expected. The White-letter Hairstreak is no exception as normally they would not be seen until July.

At Newport the colony of White-letter Hairstreaks were counted in almost double figures and it is pleasing to know that this is the third year in succession that they have been recorded here.The photo below shows the disease resistant elm ( the smaller tree on the right) where these butterflies have made their home.Unlike many sites where it is normal to gaze up at the Hairstreaks from ground level the adjoining foot bridge gives an excellent vantage point.

Thursday 30 July 2015

Something New,Something Blue.

With a report of a probable second brood of Small Blue at a nearby established colony a few days ago,I was at last able to take a look for our smallest butterfly.The weather has been very changeable over recent days but thankfully today the strong wind had abated and we enjoyed some warm sunny periods.It was not long before I came across two mating pairs and although Small Blue colonies tend to be fairly small ,such as this particular one,hopefully a few more butterflies will emerge.

The flight period is from May to late June with an occasional second brood in late July and August.At this location however it is normal for this species to appear in April.

Wednesday 2 July 2014

Still Around.

A surprise sighting yesterday at Shepherds Chine on the Islands' south west coast was a late Glanville Fritillary. The first sighting was back on 29th April and normally one would not expect to see it in July.

The Adonis Blue

The Large Tortoiseshell

It seems the general view on the status of the Large Tortoiseshell in Britain is that it is now extinct as a breeding butterfly.
It is a butterfly of woodland edges and hedgerows that abound in willows,elms,and poplars.These trees are used by the adult to lay its eggs and this single brood appears in July and August.The emerging butterfly then hibernates over the winter in log piles and hollow trees until the next spring.
On the Isle of Wight sightings are more often than not made from early March to April.Have these butterflies overwintered on the Island or have they come from the continent where it is common?
Any sightings made in July/August pose the same question.Another explanation could be that captive-bred releases are responsible.Only the discovery of eggs and caterpillars will probably answer these questions.

I can now report that evidence has been found of breeding just along the coast at Portland in Dorset (June 2020) and again at the same location in the summer of 2021.

The Glanville Fritillary

This elegant butterfly is mainly confined to the crumbling undercliffs and chalk downs of the Isle of Wight.It is also found on the Channel Islands and at one or two isolated colonies on the British mainland.In Britain the Glanville Fritillary is at the extreme north-western edge of its range.On the continent it is readily found in flowery habitats.
Around the southern shores of the Isle of Wight the cliffs constantly erode causing them to slip away and provide perfect conditions for new growths of the butterflies laval host plant,Ribwort Plantain.
The eggs are laid to the underside of the leaves of this plant and normally hatch after about three weeks.The resulting caterpillars live together in communal webs spun over the plantain.In the autumn they hibernate and recommence feeding in the spring,eventually dispersing to prepare for pupation.
The adult butterfly is on the wing from May to the end of June with the female being larger than the male.They will feed on,amongst other things, Birds-foot Trefoil and Thrift.

The Wall Brown

On the Isle of Wight in particular,the Wall Brown is a butterfly of field edges,coastal cliffs and dunes,and rabbit-grazed downland.
The male is territorial and spends much of the time patrolling and basking on the ground.
The female,which lacks the males conspicuous dark sex brand across the forewings,is larger.The undersides of both sexes are beautifully cryptic when at rest.
The Wall Brown generally produces two broods a year,the first from late April until late June and the second from mid-July to mid-September.