The Deskbound Birder: May 2019

Wednesday 29 May 2019

Titchfield Haven, Rough Bank and Chappetts Copse - 26th-29th May

A much needed free weekend after a very busy period at work saw Tobias and I venturing to Posbrook Flood and Titchfield Haven on 26th May. A Squacco Heron has been presented at Posbrook Flood since 24th May and as this was a British tick for me I was keen to try for it. Parking at the Bridge Street car park we walked south along the canal path to the main viewing area looking east to the rather obscured floods. A Treecreeper showed well as it fed its chicks in a hole in an oak at a height of only 1.5m, this entertained Tobias for a while. We eventually had rather brief views of the Squacco Heron as it fed in the reeds and grasses of the flood and a brief view as it took flight and flew to the back of the flood and into deep vegetation. Tobias was bored and wanted to go and look for Terns at Titchfield Haven and so we drove round to the coastline. It was extremely windy and the wind and kite surfers were out in force and after watching them for a while we wandered onto the reserve. From the Meon Shore hide we watched around 15 Common Tern at close range but the numbers of Black-headed Gull in the colony seemed very low. There was little else to be seen but we enjoyed a couple of Avocet and an Oystercatcher incubating its single egg. We decided it was time to head home.

Treecreeper - Canal Path, Posford Flood

Common Tern - Titchfield Haven Nature Reserve

Oystercatcher - Titchfield Haven Nature Reserve

On 29th May I had a survey to do in the Cotswolds and after this was completed I popped to Rough Bank, a Butterfly Conservation Reserve. The weather was pretty dreadful and I only stayed a short while but it is a superb site. Highlights were Lesser Butterfly Orchid, White Helleborine, Small Blue and Adonis Blue. The butterflies were all sheltering atop of grass blades in the cold and windy conditions.

Rough Bank Butterfly Conservation Reserve

Greater Butterfly Orchid - Rough Bank, Gloucestershire

Another day, another survey and another bit of Orchid twitching. Firstly, I popped to a site on the outskirts of Guildford where at least 30 Man Orchid were at their peak of flowering, a species of Orchid that I had not seen before. Their stunning stiff flower heads topping the surrounding vegetation and making them conspicuous in the sward.

Man Orchid - Guildford

Sainfoin - Guildford

View from the downland at Guildford

I then went to the Hampshire Wildlife Trust Reserve of Chappetts Copse where adjacent to the small car park were two Bird's-nest Orchids. A short way along the main ride were half a dozen tiny Fly Orchid. The star here is Sword-leaved Helleborine, a rare and declining species in the UK which has one of its strongholds in the copse. The white flowers of the plant speckle the otherwise dark floor of the beech woodland in profuse numbers. I wandered amongst the plants for a short while before heading back to the office.

Bird's-nest Orchid - Chappetts Copse, Hampshire

Fly Orchid - Chappetts Copse, Hampshire

Sword-leaved Helleborine - Chappetts Copse, Hampshire

Chappetts Copse

Thursday 23 May 2019

Martin Down and Bentley Wood - 23rd May

On a beautiful sunny morning I visited Martin Down National Nature Reserve primarily to see Burnt Orchid, now in its peak flowering period. Parking in the car park off the A354, on opening the car door I immediately heard the beautiful soft purring of a Turtle Dove, the bird showed well in the scrub adjacent to the car park as it sat atop a Hawthorn and undertook frequent display flights. From the car park I headed directly to the Bockerly Dyke and walked southwards. The sound of Corn Bunting, Sky Lark and Yellowhammer filled the air and my first Cuckoo called distantly. Butterflies were abundant with good numbers of Small Blue, Common Blue and Dingy Skipper and smaller numbers of Adonis Blue, Grizzled Skipper and Green Hairstreak. I soon reached the area for the Burnt Orchid and found around 10 nearly pristine examples. Wandering back towards the car I spent some time with the small colony of Marsh Fritillary that occur just north of the main mound of the firing range. I came across around 10 males and a freshly emerged female, these are stunning butterflies and one of my favourite British species.

Burnt Orchid - Martin Down NNR

Field Fleawort - Martin Down NNR

Crosswort - Martin Down NNR

Grizzled Skipper - Martin Down NNR

Adonis Blue - Martin Down NNR

Green Hairstreak - Martin Down NNR

Marsh Fritillary - Martin Down NNR

Turtle Dove - Martin Down NNR

Yellowhammer - Martin Down NNR

Corn Bunting - Martin Down NNR

I then headed the short distance to Bentley Wood where I spent an hour or so in the Eastern Clearing. Here a very obliging and freshly emerged Small Pearl-bordered Fritillary was conspicuous amongst the more worn and more abundant (c.15) Pearl-bordered Fritillary. A couple of rather tatty Marsh Fritillary and a Grizzled Skipper were also present. However, the highlight was a stunning fresh Narrow-bordered Bee Hawk which showed very well, it appeared to have just emerged and spent some time perched low in the vegetation before vanishing at high speed and with a deep humming sound.

Small Pearl-bordered Fritillary - Eastern Clearing, Bentley Wood

Pearl-bordered Fritillary - Eastern Clearing, Bentley Wood

Narrow-bordered Bee Hawk - Eastern Clearing, Bentley Wood

Wednesday 22 May 2019

Red-belted Clearwing, Romsey - 22nd May

Over the winter I purchased a full set of clearwing pheromone lures and a pheromone trap from Anglian Lepidopterist Supplies (ALS) I was keen to see more of these species having only encountered Currant Clearwing and Six-belted Clearwing previously. So with a partial day working at home in Romsey and lovely warm and sunny conditions, I studied the range, flight periods and foodplants of the 16 British species and decided to try for Large Red-belted Clearwing using the 'cul' lure. After an hour or so I popped outside and was amazed to see a clearwing in the trap, expecting it to be a Large Red-belted I was surprised when I captured the animal and realised it was a stunning fresh Red-belted Clearwing. This was an unexpected catch as the species is said to fly from mid-June and comes to the 'myo' lure. Still, I am not complaining, this was a stunning beast!

The Red-belted Clearwing is classified as Nationally Notable B but is actually probably more widespread than this status indicates. The species is found through south-east England roughly south-east of a line from the River Severn to the Wash. The larval foodplant is apple but it has also been recorded from hawthorn, pear, almond, and rowan. The species is found in open woodland, gardens and orchards.

Male Red-belted Clearwing - Romsey

Tuesday 21 May 2019

Noar Hill National Nature Reserv, Selbourne - 21st May

After a breeding bird survey near to Havant I headed to Noar Hill National Nature Reserve to see if I could connect with Duke of Burgundy. This 20 hectare reserve was was formerly a medieval chalk working is owned and managed by Hampshire and Isle of Wight Wildlife Trust (HIWWT). The reserve consists of a mosaic of scrub and species rich grassland which has a high diversity of invertebrates, many of which are rare and scarce. The population of Duke of Burgundy at the site is one of the strongest in Hampshire and, while towards the end of the flight season, I was keen to see this rare and localised species which is on the wing for only a few weeks in a year. On arrival at the site the first butterfly I saw was indeed a Duke of Burgundy but it was a very tatty individual with worn wings and a missing antennae. The next butterfly was a stunning and pristine Small Blue and then a Dingy Skipper. I began to encounter more Duke's and through the hour or so I was at the site I encountered around 15 specimens, mostly they were fairly worn, but I came across at least three fresher individuals.

It was still a little early for the vegetation to be in full bloom but there were hundreds of Common Twayblade and Cowslip as well as around 10 Early Purple Orchid which were far past there best. It was a very enjoyable stop but the pressure was on to get back to my desk.