02 April 2017

out and about with the bees and wasps, at last

Nice to get out a little this weekend, after a winter of indoor work on the bees and wasps. Lots of the usual early spring suspects are about e.g Bombylius discolor, Cicindela campestris and a few hoverflies.

Yesterday I cycled to Mumbles and hung about a Willow tree, camera in hand, took photos and tried to identify. Much to my surprise I did actually manage to identify some of them but it sure isn't easy, even after 5 years of intensive work. Because it's still so early in the year the vast majority of solitary bees seen are males, identified by the fact that they have 13 antennal segments compared to the female's 12. You can see them all in the better picture of Trimmer's Mining Bee below.

Firstly I found The Yellow Legged Mining Bee (Andrena flavipes), an old favourite as you can pretty much identify them in the field by the stripes of hairs on the abdomen and yellow haired back legs of the female. This one is a male and, as you can see below, is widely distributed on the Gower with 2 generations a year (bar chart) and nests in soft cliffs and other bare places, often in large numbers.
Secondly I found a male Cliff Mining Bee (Andrena thoracica), also widespread in much smaller numbers twice a year, and nesting in similar bare places to the bee above. It can easily be identified by the ginger thorax and black, very shiny abdomen in both the male and female. If you can see any white hairs it is not this species.
The third species I could identify is less widespread but also flies twice a year with a different appearance between spring and summer broods, a while ago treated as 2 different species. This is Trimmer's Mining Bee (Andrena trimmerana), identified in these photos by the red brown marks in the first 2 abdominal segments (red arrow) , the spine from the Gena below the eye (blue arrow) both best seen in the fuzzier photo, and the third antennal segment being half the length of the fourth, best seen in the clearer photo. In the summer generation of males the genal spine is absent, just to make life difficult.

Since 2012 I have been trying to record as many species of bee and wasp as I can on the Gower. I have not bothered much with Bumble Bees, nor Social Wasps and not at all with ants. I have recorded more than 200 species and if you want to look at all the maps they are here on my flickr website:

https://www.flickr.com/photos/iantew/albums/72157679972331290

A few maps are missing as the species are very difficult to sort out but hopefully I can add a few more maps very soon. There is much to be learned including, every time I think I've found something new I discover this is not the case, mostly. Keeps the excitement levels up! A few days after starting in 2012 I seem to have caught something new for Wales, Nomada guttulata, but it took me 5 years to get up the confidence to think it is correct. Confirmation of this will have to wait until The Bees Wasps and Ants recording scheme have trawled through my records unless someone knows better now! Numbers of insects shoot up and down alarmingly and distributions change a lot so contributions are always valuable and it takes a long time to get to know a site fully.

25 February 2017

Lone Wolves


For anyone who doesn't get the BAY magazine, here are this month's bugs! Enjoy! 





10 February 2017

Great White Egret

Great White Egrets are no longer quite the rarities that they used to be, but they are still far from common and are very impressive birds. I was lucky enough to be at WWT on Wednesday when a Great White Egret put on a real show. The bird came very close and the light was bright. The photos largely speak for themselves:










Little Egrets were also active and one came close enough to the Great White Egret to allow a clear view of their relative sizes.




05 February 2017

Fulmars at Fall and Mewslade

For most of the year Fulmars are a welcome feature of the cliffs in the Fall-Mewslade section of coast. They usually disappear out to sea for October and November but there are usually some around the cliffs in all other months. In January-February the numbers usually increase and this year is no exception, there being about 20 birds in the Fall-Mewslade section this weekend. Breeding Fulmars lay only one egg per year, usually in the first half of May. In both 2015 and 2016 a pair of Fulmars succesfully bred on a ledge on the east side of the cliff known as Lewes Castle, adjacent to Fall Bay. The juveniles fledged in September each year. I have been watching this nest site quite frequently for about three years. A pair of birds is now showing a lot of interest in the site. I presume this is the same pair as previously, but I have no way of being certain. Since mid January several Fulmars have been flying close to Lewes Castle and the Devil's Truck cliffs, displaying their astonishing (to me) flying ability, using their feet to make fine adjustments as they fly close to the cliff face.



I first saw a bird on the nesting ledge in late January. This weekend it was sitting on the ledge for a long period and defending it vigorously against other Fulmars:


One bird was welcomed onto the ledge; this bird seems to be the other half of the pair. Another bird also managed to get onto the ledge for a short time.



The unwelcome bird is the middle one of the three. The actual nesting site is behind the triangular boulder on the right. It wasn't long before the interloper was persuaded to leave:


The two members of the pair then engaged in what I interpreted as pair-bonding behaviour. This "canoodling" went on for about ten minutes.

 

Although it will be another three months before an egg is laid it looks as though the pair is getting established for another successful year.

There is a well-established pair of Ravens between Fall and Mewslade. These two birds were also engaged in nuptial behaviour:



Ravens are early breeders, so the eggs should be laid soon.


30 January 2017

Still a quiet time for bugs, but some of the groundbeetles are never too far away!





05 January 2017

Gower Cameos




A new year-long blog about wildlife on Gower started on 1st January. There will be about 20 short 'cameos' each month concentrating mainly on birds and other wildlife, and also expressing what it feels like to live on Gower. These short  'cameos' were not written in a given year, rather they illustrate typical monthly events. You may wish to take a look, and click the blue 'Follow' button.

www.gowercameos.blogspot.co.uk