Butterflies Back on the Landslip.

Despite the cool wind that has blown for a few days now the butterflies on our landslip have found those sheltered places where they can enjoy the sun and nectar on the abundance of spring flowers.Today the list of sightings at Compton Chine included at least ten Glanville Fritillaries with a mating pair,three male Common Blue, four Green Hairstreaks,a Dingy Skipper, a Small Copper,and two Small Heath.

Back at Afton Down Chalk pit which overlooks the chine there were several Small Blue.

Mild Temperatures Bring Out the Glanvilles.

The mild temperatures of the last week have enticed  the Glanville Fritillary larvae out of their winter hibernacula to sun themselves on the south facing slopes of our Island cliffs.

The webs seen today at Shepherds Chine revealed many caterpillars out and about enjoying the warm sunshine.They are no more than one centimetre in length at present and into their fifth instar.

Late Summer Butterflies on the Landslip.

Today on the landslip beneath the coastal cliffs along the south west shore of the Isle of Wight there was a good selection of late summer butterflies.This unique area is well known for the Glanville Fritillary butterfly during May and June.A strong onshore wind blew today but in any sheltered spot,especially where yellow fleabane is flowering the butterflies congregated.Many seemed to be a excellent condition with Common Blue particularly striking.Surprisingly the Wall Brown proved to be the most numerous,as these coastal cliffs are a favourite for this species.Other butterflies on the wing were Peacock,Small Copper,Small Heath,and two flyby Clouded Yellow.

Glanvilles Take Over the Slopes.

It is now three weeks since the first adult Glanville Fritillary was reported on the the Isle of Wight.Today on the landslip close to Compton Chine the Glanvilles were out in force despite the seafog rolling in and cooling down the temperatures.In cloudy weather the butterflies tend to snuggle down in the long grass but there were still plenty to see nectaring on the thrift and ribwort plantain.It certainly looks like another good year for this butterfly and encouraging are sightings made in the east of the Island.

Green Hairstreaks Take The Stage.

A  favoured site for spring emergent butterflies produced its first residents this morning.Following several days of very cool and unsettled weather, today dawned bright,sunny and mild.The Whiteways Quarry site is now a National Trust car park and is situated at the base of Afton Down.It's south west aspect overlooking the sea is a good location for several spring butterfly species and soon Small Blue,Grizzled and Dingy Skipper,and Glanville Fritillary will be seen here.

Glanville Fritillary Larvae Out in the Sunshine.

Now that the days are slowly lengthening and the sun's rays becoming warmer the Glanville Fritillary larvae are starting to move in and around their communal webs.Today on the slopes of the crumbling cliffs along the Island's  south-west coast several webs showed signs of activity as the caterpillars enjoyed the sunshine, although due to the cold breeze they mostly remained huddled together.

Glanvilles Showing Well.

At this time of year the cliffs on the Isle of Wight are carpeted in Thrift and these drifts of bright pink attract insects, in particular the butterflies.The number of Glanville Fritillaries are now on the increase and today I saw many on the landslip.The peak of their season has yet to arrive and hopefully there will be many more on the wing during the next few weeks.

First Adonis Blue & Glanville Count Rises.

With Adonis Blue already reported from several mainland locations,I decided to try my luck today on Bonchurch Down.The numbers of Adonis have decreased in recent years due to less than ideal land management on the Down and the fall in the rabbit population.The Adonis require short downland grass to be successful and the lack of grazers such as the rabbit has allowed the grass to grow long.A check of the male Common Blue butterflies encountered today led to my first record of the year of a Adonis Blue.These two species are very similar,but close inspection will leave no doubt if it is an Adonis. The spectacular and striking sky blue of the male Adonis is unmistakeable.

Not too far away is the premier site for the Glanville Fritillary and since the first appearance of this special butterfly four days ago numbers have steadily increased.Todays count amounted to eight pristine fritillaries all resplendent with their orange and brown chequered wings and a white border.The underside has a pattern of cream and orange bands with black marks.

Glanville Fritillary Takes to the Air.

Following yesterdays report of the first Glanville Fritillary on the wing in 2017 I made the trip to the south of the Isle of Wight in the hope of seeing this special butterfly.The Island has the only natural habitat for this butterfly in the UK, so it is always an unique event when the Glanville makes its first appearance.

After some searching the one individual was spotted busily feeding on a variety of the many plants that are flowering at this site.The sighting was all too brief as it flew off up the slope and was not seen again. Still,we can look forward to seeing more Glanvilles in the next few days as they emerge on the cliff tops along the Island's south-west coast.
Other species were in the main absent,although it was encouraging to see at least six Common Blue feeding  on the abundant Red Valerian. 

Getting Ready.

The Glanville Fritillary caterpillars will soon be ready to disperse and pupate.Their flying season could be just three weeks away.Many of the larva that I saw yesterday are in the sixth instar and these larger larvae can be seen merrily munching on plantain leaves.However some caterpillars have not reached that final stage and are still seeking the safety of their webs.Some webs also show signs of their development with discarded  moult skins.

Web with discarded larval skins

Warm Temperatures Bring On the Butterflies.

We enjoyed above average temperatures yesterday on the Island and it was most likely the warmest day of the year so far.Therefore,I was not surprised to see my first butterfly of 2017 sunning itself on the ground in my garden.No doubt this Peacock had just come out of hibernation and was after some nutrition.It soon flew onto a daffodil where it began to nectar.
After lunch I made a short car ride along the coast and visited one of the numerous Chines that are found here to see the state of Glanville Fritillary caterpillar webs that dot the sides of the coastal cliffs.With the sunshine warming up these grassy knolls caterpillars were evident although at this time they are small,only 6mm or so in length.By late April they will have grown considerably and will begin to disperse from their communal webs to find place to pupate.

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