Wrinkled Fieldcap

I was walking by the River Calder, near the Hepworth Gallery, when I spotted a mass of fungi on a pile of woodchips.

Wrinkled Fieldcap (Agrocybe rivulosa)

I did my best to identify them using books but again needed the help of the British Mycological Society and I found that they are Agrocybe rivulosa.

Wrinkled Fieldcap (Agrocybe rivulosa)

This species arrived in the UK just over a decade ago and has probably been encouraged to spread by the increasing use of bark and woodchip mulches. It is now common and widespread in Britain.

Wrinkled Fieldcap (Agrocybe rivulosa)

A common name used for this species is wrinkled fieldcap.

Insects at Hemsworth

After a train journey from the south of England, I stretched my legs by walking back to Hemsworth, from Fitzwilliam, using the scenic route.

Lucilia sericata

By the path, I found common green bottles feeding on hogweed and they were very striking when looked at closely. This species is one whose maggots can be used to clean wounds very effectively. They will eat dead tissue whilst leaving living tissue alone.

Graphomya maculata (female)

I identified another very striking fly that I saw as Graphomya maculata, also feeding on hogweed. It’s said to be found in damp areas and these were photographed on the edge of marshy ground.

Graphomya maculate (male)

Also on the hogweed, I found a true bug that I believe to be Grypocorus stysi. This species is said to feed on both flowers and small invertebrates such as aphids.

Grypocorus stysi

 

 

A Visit to Brockadale

Colin Booker and I took a trip to Brockadale yesterday, with the expectation of seeing lots of butterflies. However, we found very few flowers on the knapweed and this was one reason why butterfly numbers were low.

Marbled white

We saw a few marbled white and a single dark green fritillary.

 

Green-veined white

A highlight was the sight of banded demoiselles flitting around by the river.

Banded demoiselle (male

Banded demoiselle (female)

The demoiselles are found at the foot of the field in which musk thistle is often to be found.

 

Musk thistle

Although it wasn’t especially sunny, we saw at least five common lizards basking on logs.

Common lizard (pregnant?)

One lizard looked quite plump. Common lizards(Zootoca vivipara) are viviparous, i.e. they give birth to live young. This typically happens in July, so there is a good chance that the plump lizard was pregnant.

Common lizard

Peregrine Casualty

Unfortunately, one of this year’s young peregrines died earlier this week following a collision with a building. The female PCA was found near Sainsburys, Ings Road and was cared for by Jean Thorpe, of Ryedale Wildlife Rehabilitation.

PCA being X-rayed

PCA was examined by Mark Naguib, a vet who has lots of experience in dealing with raptors. Mark found that the bird had dislocated an elbow joint at least 24 hours earlier. He tried to put the bones back into place but this proved to be impossible and the decision was taken to end the bird’s life whilst it was still under the anaesthetic.

The decision was not an easy one but it was based on the fact that peregrines rely so heavily on the use of their wings to hunt their prey. PCA would never again have been able to live freely and to hunt as a peregrine should.

Dislocated elbow joint

 

We are grateful to Jean and Mark for the time and effort that they have given to caring for PCA.

It’s always sad to hear of the death of a peregrine but we must stand back and look at the whole picture. The Wakefield peregrines have now fledged ten young. We know of four deaths, all caused by collisions, and this means that there are, potentially, six new peregrines out there somewhere. If fifty percent of young peregrines survive the first year, that should be considered to be a good result. In their lifetimes, our two adults need to produce only two new peregrines that go on to breed successfully to replace themselves. I think there is a good chance that they have succeeded in that task.

Carlton Marsh

Colin Booker and I visited Carlton Marsh nature reserve today. It was my first visit and I was impressed by the range of things to be seen.

Golden bloomed grey longhorn beetle (Agapanthia villosoviridescens)

Early in the walk, we found a golden-bloomed grey longhorn beetle – minus one horn (antenna) – on hogweed. This is the second species of longhorn beetle that I have seen in one week and it may be an indication of how these species are expanding their ranges northwards.

Cheilosia illustrata

Another insect seen was a large hoverfly, for which my suggested identification is Cheilosia illustrata.

Fly killed by Entomophthora fungus

We also spotted a fly, on the underside of a leaf, which had been infected by an Entomophthora fungus. This fungus causes the fly to change its behaviour so that it walks up a plant. It then dies but it doesn’t fall from the plant because fungal hyphae grow from its feet to attach it to the plant. Spores of the fungus are then carried away on the breeze.

Mignonette (Roseda lutea) & musk mallow (Malva moschata)

There was a wide range of plant species to be seen.

Wild carrot (Daucus carota)

Wild carrot is a common plant but the flower head is very attractive when viewed closely.

Greater knapweed (Centauria scabiosa)

 

Fledging of the Peregrines

The 2017 season has been another successful one for the Wakefield peregrines. The same two adults have now bred on the cathedral in three successive years. This year, they had four eggs, with the female laying the first egg within two hours of the time when the first egg appeared last year. We believe that one egg was accidentally punctured by a talon and, as a result, only three of the four eggs hatched. The three young peregrines have been given orange rings with the codes PAA, PBA and PCA. PBA is the only male.

Juvenile peregrines

As usual, the adults did a good job of raising the youngsters. They fledged on a very windy weekend and ,as a result, there were a couple of mishaps. Instead of being able to spend time jumping up onto the wall above the box and running along the wall flapping their wings, the youngsters tended to get whisked away by the breeze and a couple found themselves down on the ground. The young male, PBA, was returned to the tower almost immediately but a female, PCA, landed late in the evening and was returned the next day, after a medical check organised by the people at Wise Owl Bird of Prey Rescue. PCA had a limp but no broken bones.

Juveniles PBA & PCA

All three of the youngster are now flying freely, putting on some good displays as they chase each other in the skies above Wakefield. As usual, they have chosen the roofs of the tower blocks as their favourite base.

These three youngster bring the total fledge since breeding began in Wakefield to ten. We look forward to hearing news of sightings of Wakefield birds in other cities at some time in the future.

Peregrine Ringing, 2017

A big event on the peregrine calendar is the ringing of the peregrine chicks. This year’s ringing took place on Saturday, 27th May, when the youngsters were three weeks and four days old.

Peregrine chicks

The youngsters were collected from the nestbox and ringing was carried out inside the spire, out of sight of the parents. This was done by members of the Sorby Breck Ringing Group. The ringers are licensed to ring birds such as peregrines, which are given special protection as “Schedule 1” birds.

Ringing a peregrine

The young birds were fitted with metal BTO (British Trust for Ornithology) rings. This type of ring carries a number which can be reported to the Natural History Museum if a bird is found dead or injured. Each peregrine was also given a plastic ring carrying just three letters. These letters can be read on live birds using binoculars or telescopes. The plastic rings provide the opportunity for receiving information about the movements of the peregrines in the future. The three rings used were orange and carried the letters PAA, PBA and PCA. PAA and PCA are females, whilst PBA is a male.

Taking measurements of a peregrine chick

The chicks were weighed and this was the key to deciding the sex of each youngster. Females are larger than males and the largest of the Wakefield chicks weighed 1.1 kg. The smallest chick, the male, weighed only 750g. As you can see form the picture, other measurements were taken.

Barn owl chick

Whilst they were in the area, the ringers arranged to ring four barn owl chicks which are growing well in a nestbox maintained by Danny Kirmond.

Little owl chicks

Danny also has a little owl box containing a brood of young little owls. The ringers were able to ring those. When they went to do this, they found an adult in the box, so they took the opportunity to ring that too.

Adult little owl

It was quite a productive day for the ringers and we are grateful to them for taking the time to deal with our peregrines.

Peregrine Chicks, 2017

The peregrines on Wakefield Cathedral have been incubating four eggs for almost five weeks. The first hatching was expected on Tuesday, 2nd May, 34 days after the laying of the third egg.

Hatching

On Tuesday afternoon, it was clear that something was happening because the female fidgeted a lot and looked down towards the eggs frequently. She also refused to take anything when the male tried, several times, to make a food delivery. Eventually, she shifted position and we could see that at least one egg was hatching.

First Sighting of a Chick

Our first sighting of a chick came later on Tuesday evening, when the female left the chick and eggs briefly to relieve herself by reversing up to the edge of the nestbox. Judging by internet comments, a lots of people, including at least one in Australia, were glued to their screens as they waited to see how many eggs would hatch. For peregrines, it’s normal for most of the eggs to hatch almost simultaneously, whilst the remaining egg hatches a couple of days later.

First Feed

It was the following morning when we saw that three eggs had hatched. The female fed the chicks and then, for the first time, allowed the male to go near them so that he could sit on them whilst she took a short break.

Damaged Egg

Unfortunately, one egg was damaged at some point during the incubation period. The damage was first noticed a few days before the hatching. It looks like a puncture caused by a talon. In the picture, you can see that the female has relaxed the toes of her left foot so that they curl up. This is what the birds do instinctively as they approach the eggs to avoid causing damage. However, accidents do happen and it isn’t unusual for an egg to be damaged. As three chicks hatched together, the damaged egg must have been the last one to be laid.

 

Alder Leaf Beetle at Fitzwilliam

I was walking around Fitzwilliam Country Park this afternoon when I spotted lots of metallic black/blue beetles on the leaves of an alder. I think the alder is Italian alder (Alnus cordata).

Alder Leaf Beetle on Italian Alder

I believe that the beetles are Alder Leaf Beetle. This species has been absent from the UK for about 60 years and it began to be recorded again in about 2004. It is likely that it was reintroduced to the British Isles by the plant trade.

Alder Leaf Beetle (Agelastica alni)

There were many beetles on this and other trees, singles and mating pairs. You can see holes in the leaf in the picture above. This species causes significant damage to alder and can reduce leaves to skeletons. It was recorded at RSPB Old Moor in 2012 and it has been recorded at Wintersett since 2013.

Spring Moth-Trapping

The weather has been a bit cool but I have put out the moth trap on a couple of nights this week. There was a threat of some overnight drizzle, so I used my usual arrangement of a tripod and umbrella to protect the mercury vapour bulb, which might shatter if exposed to rain.

Moth trap

The catch was much lower than I would expect on a summer night, only two moths on each occasion. The first night produced early grey and a male muslin moth. The second night gave another early grey and a powdered quaker.

Clockwise from left: Early Grey, Muslin Moth and Powdered Quaker

All of the three are common but it was the first time that I had caught powdered quaker in my garden. This brings the total number of macro-moths found in the garden to 89 but I think there is further to go because I regularly log new species.