Bean Geese and Ping pong bats

I don't know whether it is just luck or that spring has come to North Cornwall, but we are extremely fortunate in the two species new to me and quite unusual.

On Monday, 7th February, we decided to take one of our regular walks around Upper Tamar Lake.  We had heard that there were some rare Geese seen in the previous week. Although we had not expected them to still be around, we did look for them anomgst the large flock of Canada Geese on the fields bordering the western (Cornwall) side of the lake.

We were in luck!  Around 200 Canada Geese were grazing on the open field with three Tundra Bean Geese on the edge of the flock.  Even better, they were not too close to take flight nor too far to be photographed.

So, one species new to us - a major "tick" Anser serrirostris.

Two Tundra Bean Geese amongst Canada Geese

A resting Anser serrirostris.

Today, 10th February, was my day for Riverfly - surveying my local stream, the Tidna for freshwater invertebrates.  The stream is found in a deep Cornish wooded valley about 200 feet down a set of steps to the valley bottom.  

Once the survey is complete, it is a slow climb back up stopping occassionaly to catch my breath.  About halfway up I spotted a dead branch beside the steps with an interesting row of tiny orange fungi growing along it.  I stopped to examine them and was surprised to recognise a fungus previously seen on Lundy.

They were Orange Ping Pong bat fungi, an invasive species only recently found in the UK and spreading around Cornwall and Devon.

The cap is only around 7mm in diameter (the picture shows a ruler with 1mm divisions) but the underside is distinctive and diagnostic.

Although invasive, it is no threat to the flora of the UK in that they decay dead and dying timber only.

The rest and the find gave me a spring in my step and the remaining steps did not slow me at all.

What a find two rare species in one week!

Orange Ping Pong Bat fungus underside

Favolaschia calocera - 7mm cap

 

UNLOCK!

No, it's not the sound of Mr Speaker, Sir Lyndsay Hoyle MP, announcing the end of a division in the House of Commons.  It is what has happened over the last week in the surveying world.
British Trust for Ornithology were the first to announce the lifting of surveying restrictions which had been in place since late March.  They were followed by Riverfly and UKBMS.  All them caveated the lifting of surveying restrictions with government advice on social distancing and a maximum of two people surveying.

I must admit to slightly preempting the Riverfly announcement by surveying my Tidna site on 14th May.  Water levels were falling and I didn't want to risk missing the opportunity to survey while there was still some water flowing in the stream.  Despite my misgivings, there was an abundance of invertebrates in the stream giving an abundance score of 12, 4 over the trigger level with Baetidae contributing an abundance score of 3 with over 250 individuals counted.

My Riverfly survey site on the Tidna - May 2020

On Sunday 17th I completed my first WeBS (Wetland Birds Survey) since March at Maer Lake.  Water was in very short supply here with this seasonal lake drying rapidly. 

Maer Lake drying out May 17th 2020

The lack of water and time of year limited the number of birds seen, but I was able to add Mute Swan and Whitethroat to my personal species list for this site as well as seeing a pair of Shelduck.  These bred last year, so with a little luck, and some rain, we may see more Shelduck chicks this year.

Maer Lake - Mallard, Mute Swan, Moorhen and Black-tailed Godwit.

Maer Lake - a pair of Shelduck

I followed this with my survey of Lower and Upper Tamar lakes on Monday 18th.  Again, water levels and species diversity was down.  But Mallard and Canada Geese have bred and young were seen as well as the spring migrants such as Chiffchaff and Willow and Sedge Warblers.

Canada Geese and Goslings at Upper Tamar Lake

Sedge Warbler at Upper Tamar Lake

All these synchronised BTO WeBS surveys were one week later than previously planned due to the length of the lockdown.

My most recent survey was today, the 20th, probably the hottest day of the year and ideal for my butterfly transect unlocked and now made possible by  UKBMS (United Kingdom Butterfly Monitoring Scheme).  This is normally a weekly survey which I last undertook during the last week of March.  What an excellent survey, 73 butterflies of 12 species - Large Skipper; Brimstone; Large, Small and Green-veined Whites; Orange Tip; Green Hairstreak; Small Copper; Common Blue; Small Pearl-bordered Fritillary; Speckled Wood and Small Heath.  What a wonderful range of species.

Green Hairstreak Tidna Valley

Small Heath Tidna Valley

Small Pearl-bordered Fritillary Tidna Valley

Common Blue Tidna Valley

I plan to complete my monthly suite of surveys with my two other Riverfly surveys in Coombe Valley and Duckpool/Stowe Woods Bee Walk (although this latter has only just been authorised by Bee Conservation Trust).
It the weather continues as it looks to be, sunny and dry, it is looking like and excellent year for invertebrates now we are unlocked.

A Wonderful Wildlife Week

Every now and then there is a week that is day after day of natural history. 


This last week was just such a one. There was an event planned for every day and the weather was kind.

Great Crested Grebe on her nest

Monday The monthly BTO Wetland Bird Survey was due, and as usual we deferred it for a day to avoid the busy weekend at Tamar Lakes. It is April so the winter visitors had gone and there was only a chance of spring or summer visitors being present. We did hear a single Sedge Warbler staking out his territory and spotted a Great Crested Grebe sitting on a newly constructed nest. There was also one or two Chiffchaffs, Willow Warblers and a lone Swallow.

Peacock butterfly

After lunch the weather was warm and sunny with hardly any wind. It was the ideal time to walk our newly registered UKBMS butterfly transect. This starts at the Bush Inn at Crosstown in Morwenstow, descends to the Tidna Valley and follows the river to the coast then up the cliff before heading inland along a green lane to Crosstown Green. It was a good decision with butterflies of four species – Speckled Wood, Small Tortoiseshell, Comma and Peacock.

Sunset over the south end of Lundy

Tuesday We had an early start, leaving Bideford quay at 9am for Lundy. The sea was like a mill pond but we saw no cetaceans and few birds. The island was alive with spring birds though – Willow Warblers, Chiffchaffs and Blackcaps. I spotted a Sparrowhawk at Quarter Wall Pond after a long meeting inside. The return trip was spectacular with a brilliant orange sunset over the island as we returned at 7pm.

Piscicola geometra

Wednesday The first Riverfly survey of the year on the Torridge near Bradford Mill and the first since the July 2015 was planned. In August and September last year, the river was in spate and two metres higher than normal. In the event, the river was slightly higher and faster than normal, but it turned up plenty of invertebrates. It was interesting to record the difference in abundance of the eight indicator species. Stoneflies were particularly abundant with a few extremely large specimens almost ready to become flying insects. The normal Perlodidae were joined by two specimens of Taeniopterygidae. Another unusual species, not part of the survey set, was a fish leech, Piscicola geometra.

Planting Marram Grass

Thursday This was a Bude Valley Volunteers working party day. Following the “planting” of retired Christmas Trees after 12^th night in January at Widemouth Bay the plan was to supplement this with the planting of Marram Grass. The trees were already doing their job of accumulating sand around themselves. We were allowed to dig up randomly selected Marram plants and transplant them between two rows of the trees. The expectation is that the Marram will further stabilise the sand allowing and embryo dune to form.

 This will in future plug a gap where the dunes had “blown out” and reduce the chance of sand blowing onto the adjacent coast road.

Picnic at Dexbeer Bridge

Friday The culmination of a busy week – to walk the whole length of Bude Aqueduct. Four of us started from Lower Tamar Lake and walked the whole 5 miles to Vealand Reserve where we then followed the permissive path for a final 700 yards. The weather was again kind allowing us to have our first picnic of the year at Dexbeer Bridge on Councillors Shadrick's memorial table. We shared the area with a pair of Willow tits – confirmed as they responded strongly with identical calls to those Willow Tit lure. We recorded a total of 34 species of birds on our walk including all 5 tits – Great, Blue, Coal, Long-tailed, Marsh and Willow and 4 finches – Gold, Green, Chaff and Bull. We also noted 4 spring plants – Wood Anenome, Wood Sorrel, Cuckoo flower and Lesser Periwinkle together with all 3 mammals so far seen on this walk – Roe Deer, Grey Squirrel and Rabbit.

The only let down was Friday night's Garden Moth Survey which due to the cold and wet attracted not a single moth.

Platooning

My first Osprey

 You wait for ages … ….

Today was Wetland Birds Survey (WeBS) day for September at my Tamar Lakes sites. We planned to commence as usual at 10am for consistency and arrived on time. It is still summer here in North Cornwall so we did not expect any of the migrants to have arrived. And, we were not disappointed, apart from 300 Canada Geese and a small flock of Black-headed Gulls there were few ducks and heron.

A Common Sandpiper was a plus as was meeting a new acquaintance, Harvey Kendall, who has been watching birds around the lakes ever since the Upper Lake was flooded in the 1960s. He gave us good tips on what was about, Pectoral Sandpipers but no
sighting of the reported two Osprey seen over the weekend.,

Osprey fishing

Now, I can't really say that I have been waiting all my life for sight of an Osprey. When I was a youngster, they were almost impossible to find. But, in the last 20 years while I have been actively building my lifetime list – without travelling I may add – these have been on my wants list.

In recent weeks, I have just missed one on a visit to Lundy with grandchildren and Tim Jones (14^th August) and failed to sight one on the Torridge Estuary WeBS patch of my friends, Tim Davis and Tim Jones (17^th August).

The sight of not one, nor two, but three Ospreys wheeling, diving and fishing over Upper Tamar Lake is a lifetime experience. I did not have to travel far to see these enigmatic birds, they were not just on my doorstep, but on “my” WeBS patch. One appeared far bigger than the others and was seen to fish in the lake, feet hanging down and into the water, but unsuccessful whilst we watched. All three climbed high into the midday sky before soaring off eastwards.

Three Ospreys!

You wait ages for one to appear and then three appear all at once (platooning apparently!).

Well worth the wait though.

Natural History Week June 2014

The observation and pursuit of natural history does occupy much of my time, but occasionally there comes a week crammed full – this is one such.

Ringlet

Sunday 15^th was my monthly Wetland Birds Survey.

Summer surveys don't record many water birds on Tamar Lakes and this month was no exception being dominated by the few breeders that use the lakes – families of Canada Geese, Mallard and Moorhen featuring. Terrestrial breeders were also present – Reed Bunting and Sedge Warblers were very obvious. It was a butterfly day too with a mass emergence of Meadow Brown, some Speckled Wood and a beautiful single Ringlet seen.

Large Skipper

Monday 16^th – CWT meeting

We hosted an evening with friends on the committee of Cornwall Wildlife Trust Tamar Group where we planned the activities for summer and the forthcoming winter season. In advance of the meeting we took our dog around our usual walk and were delighted to see the first Large Skippers of the year. 

Tuesday 17^th – Ponds and fields with year 3 of Bude Junior School.

Water Scorpion

72 enthusiastic 8/9 year old in four groups. It was a most hectic and challenging session, but the children were very adept at catching mud! They did catch lots of interesting creatures though ranging from Newts, through Eels, Damselfly larvae, Dragonfly larvae, water louse, freshwater shrimps, chironomid worms, water boatmen and backswimmer and the stars of the show, water scorpions. All were eagerly observed before finally being repatriated into the Bude Tourist Information Centre pond. 

Bee Orchid

Thursday 19^th – Bude Marshes quarterly transect and annual Bee Orchid count.

Although circumstances left us with only 4 on the walk, and we were accompanied by the children from Adventure International in kayaks on the canal and bikes on the multi-use footpath, we managed to record 22 birds species,

The orchid count went well too – despite the vigorous grass growth, the Bee Orchids are maintaining their numbers 33 plants as compared to last year and the Marsh Orchids, previously uncounted were counted as 69 plants. It is obvious the preferred habitat of the latter is on the short sward between footpaths and the dense grassy layer, whereas Bee Orchids are happy in the mixed flower and grass habitat growing in loose groups of 2 or 3 plants.

Friday 20^th – ERCCIS Dragonfly workshop.

Keeled Skimmer

What a fantastic couple of sites. Great Wheal Seton is a post industrial contaminated area with small shallow ponds but is host to Scarce Blue-tail Damselflies – the last remaining site in Cornwall where we were privileged to count around 30 of both sexes.

The old settling pits at Bell Lake Marsh in the Red River Valley have been transformed from overgrown Willow scrub to a shallow marshy area with scrapes and was host to Small Red Damselflies, Keeled Skimmers as well as patrolling Emperors. 13 different species was a very good workshop.

Saturday 21^st – Sandymouth BBS butterfly transect

Hummingbird Hawk Moth

Vixen and 6 cubs

Accompanied by two naturalist friends we were able to count 8 species of Butterfly – 38 in total (Meadow Brown, Small Heath, Common Blue, Speckled Wood, Small Tortoiseshell, Large Skipper, Red Admiral and Painted Lady) 2 moths (5-spot Burnet and Hummingbird Hawk Moth) and a Golden Ringed Dragonfly. They agree that this is a Beautiful Square (op cit). To cap it all, as we finished the transect, we noticed that we were being watched intently by a Vixen about 400 metres away whilst her 6 cubs played!

Sampling at Marsland Water

Sunday 22^nd – Fox Club “Dung Ho!” at Marsland Nature Reserve.

Together with a friend from Cornwall Wildlife Trust, a small group was entertained by his description of what pollutes our waterways. This was followed up by our catch of myriads of invertebrates kick sampled from Marsland Water. We used the excellent wildlife centre courtesy of Devon Wildlife Trust in the idyllic setting of Marsland nature reserve.

Marmalade Hoverfly

Monday 23^rd - Equinoctial walk on Bude Aqueduct from Moreton Bridge to the junction with the Holsworthy branch is about 2½ miles of absolute quiet taking in woody shade and open walks and Bursdon Moor Nature Reserve. We were lucky to not only hear birds but to see them too – including two Treecreepers. The stars of the show had to be the dragonflies and damselflies along with lots of butterflies. We were fortunate to capture a picture of a strikingly decorated, striped hoverfly which we identified later as a Marmalade Hoverfly. 

Read my other blog at budeaqueductwalks.blogspot.com

As I am writing this, over my left shoulder I am watching the wind ripple a field of grasses, docks and sorrel. The weather has been dry and very hot and as the wind stirs the stems of the plants, millions of seeds are blown from their heads into rolling, billowing clouds looking like smoke. They roll slowly over the field, a perfect demonstration of natural seed dispersal. They are now next year's plants in waiting.

Hundreds of Hawking Hirundines

Wild Strawberry

Today was really very windy with a strong westerly wind blowing off the Atlantic. Nevertheless a walk around Upper Tamar Lake in the bright sunshine was worth trying.

The first 10 minutes was quite cold with the wind chill, but around the more sheltered eastern branch, amongst the trees it was quite sheltered. Here were many Wild Strawberries – much taller and with bigger leaves than the early flowering Barren Strawberries and with the equal length terminal serrated tip to the leaf.

Canada Goose and goslings

The lake had lost most of its wetland birds with only a few Herring Gulls, a pair of Great Crested Grebe and a family of Canada Geese; parents and five goslings. The lake was host to hundreds of hawking Hirundines replacing them. There was over a hundred of them – almost exclusively Swallows skimming the lake and fields hoovering up the emerging flying insects. Among them were a few House Martins and Swifts though.

Green-veined White

The strong wind blew most of the butterflies beyond recognition distance for they were all “whites”. At least one of them sheltering amongst the foliage was a Green-veined White.

I was pleased to put me recent bird ringing experience to good use. I had handled a few Sedge Warblers so was able to identify, first by song then by sight one by the edge of the lake. The lemon supercilium above an olive eye-stripe and orange-yellow gape as it sang made identification certain.