Butterfly Islands: West High Down

Showing posts with label West High Down. Show all posts

Sunday 7 July 2013

The Dark Green Fritillary on West High Down

On West High Down today in glorious summer weather and a first sighting of the Dark Green Fritillary This butterfly is a powerful flier and I had numerous glimpses of it as it flew over the Down.Luckily for me,if not this particular individual, I found a Dark Green on the ground unable to fly due to deformity.A favourite flower of this fritillary is thistle and it can be found in abundance all over the Down.

Wednesday 3 July 2013

Butterflies on West High Down.

It will not be long now before the Chalk-hill Blues appear en masse on West High Down together with the Dark Green Fritillary.The second week in July is normally the time to see the first emergent however this may be affected by the lateness of the season this year.

Approaching the Down today via the usual bridleway and the first butterfly seen was a Painted Lady busily feeding on dandelions and if I am not mistaken egglaying on giant thistles.It was not long before sightings of Speckled Wood, a Small Tortoiseshell,a Red Admiral,and several Dingy and Grizzled Skippers followed.

Once in the open space of the Down a good number of fresh looking Meadow Browns were evident along with both Skippers mentioned earlier,Large Skippers,Small Heath,Common Blue, and a rather worn Green Hairstreak.

Saturday 28 July 2012

Many More Chalk-hill Blues

Another walk over West High Down yesterday in the continuing summery weather and many more Chalk-hill Blues to see.The females are now out and as with many 'blue' butterfly species it is brown and inconspicuous.

Sunday 22 July 2012

The Down in Summer

With the summer at last putting in an appearance the Downs of the Island were today a sight to behold.The blue sky,the bright blue sea , and a slight sea breeze made a wander over West High Down a pleasure.The butterflies too enjoyed the sunshine and plenty were to be seen.Small Heath,Marbled White and Meadow Brown are abundant Small Copper together with Common Blue are to be found in the more sheltered, grassy, parts on the Down.

As mentioned in my previous entry,Dark Green Fritillaries are whizzing low over the gorse and bramble in search of mainly purple coloured flowers and now the Chalk-hill Blues have emerged. I saw only eight males today but soon the Down will be a mass of these silvery-blue butterflies.It will not be long before the brown females will join them.

Saturday 8 October 2011

Dark Green Fritillary

The Dark Green Fritillary can be an impressive sight on the Downs of the Isle of Wight from July onwards.They love to feed on the Giant Thistles in particular and are very strong flyers as they go from one flower to another..This butterfly was spotted on West High Down during the first week of July and had very recently emerged.

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.