Invertebrate news 2009 |
Featuring news and sightings from Eakring and Sherwood Forest |
In most cases, clicking on the photos will link to larger images |
Two new Arachnids
for Sherwood Two new spiders have been recorded at Sherwood Forest recently, both of which seem to be new to the NNR. Based on the invertebrate lists we are collating and maintaining, there are currently no records of either Alopecosa barbipes or Cheiracanthium virescens. Both species were found in late September on Budby South Forest. |
||||
More
new Coleoptera for Sherwood Forest NNR During the second half of August, we have spent much time catching and identifying the various species of water beetles at one of the NNR's few areas of permanent water on Budby South Forest. At the end of the month, another 12 new beetles had been added to the list. The recording of Water Beetles has been totally neglected in the NNR previously, with none recorded from Sherwood historically at all. |
||
Migrant
butterflies begin to move through Early August has seen the start of Painted Ladies moving south through Nottinghamshire. At Eakring, the first were noted on August 6th, when three went south. This was followed on August 8th by a further 12 south, but movement proper, seems to have commenced on August 9th and featured several other species. Totals for a two hour count on the 9th included 93 Painted Lady, 109 Large White, 47 Peacock, five Small White and three Red Admiral all heading south-west across open fields. Movement for all species was direct. Peacock is not a species known for it's migratory tendencies, but was seen in numbers, during similar movements in August 2003. |
||
Is the Harlequin
Ladybird really a threat? The forecasted threat of the Harlequin Ladybird has still yet to appear on our local Ladybird populations, despite it being present in Nottinghamshire since 2006. Whilst it has soon spread rapidly across the county, subsequent years have seen it fail to make the huge impact on the populations of our native species that were widely predicted at the time. We have also yet to see any direct observations of Harlequin adults or larvae eating the larvae of other species. Although this is likely to happen occasionally in times of severe shortages of Aphids, it is probably no more likely than the full grown larva of another species, eating a smaller larva of the same or different species. The only instance we have ever seen of larval cannibalism, concerned a 7-spot larva eating a pre-pupating 7-spot larva at Warsop Main Pit Top back in 2006. |
...... | ||
Many of the
stories of larval cannibalism have been from larvae kept
in the confines of captivity and there is still no
accurate data to back-up the supposed Harlequin threat
from observations in the field, where there is much
greater natural food availability and considerably less
likelihood of larva meeting larva. So far in 2009, Harlequins have just started to appear in better numbers (July 20th) and although there are obvious concentrations of adults, Harlequin counts at all the sites we monitor fairly regularly, are still considerably well below those currently attained by the 7-spot Ladybird. Like all our other native Ladybirds, the Harlequin also suffered a large reduction in numbers during the wet Summers of 2007 and 2008. |
||
Welsh
Clearwing update By the end of June 2009, casual surveys using pheremone lures, have revealed that the moth is clearly more widespread at Sherwood Forest CP, than was first thought. The Country Park area is currently broken into 23 working areas C1 - C22a. Moths have now been recorded from at least five of these now, plus a single record from Budby South Forest, where it does seem to be restricted at present. Males have been attracted to lures from between 10:00h, to as late as 15:42h. A total of 46 males have been recorded to date. |
||
Yellow-legged
Clearwing latest There have also been additional records of Yellow-legged Clearwing at Sherwood Forest CP. Rob Woodward et al, attracted at least one on June 13th, whilst we had our first on June 12th. All these records have come from one area so far, but we recorded four males from two areas of Budby South Forest on June 13th and two from another area of Budby South Forest on June 14th. |
||
Recent new
Coleoptera at Sherwood Forest CP Further new beetle species found in the Sherwood Forest NNR area recently, include Chrysolina staphylaea, Ontholestes murinus, Aphodius haemorrhoidalis and Agriotes sputator. All records have come from the Sherwood Forest CP area. |
||
Yellow-legged
Clearwing also at Sherwood Forest CP Rob Woodward also attracted three male Yellow-legged Clearwing to lures on June 2nd. This is another follow-up record for Sherwood , following one over 130 years ago in 1877 (Dennis, G. and Simmons, C.W.) This quite graphically illustrates how species can remain completely undetected on a site for decades and are presumed to be extinct. |
||
Painted Ladies
decrease Painted Ladies still continuing to move through Eakring this afternoon. A one hour sample count, again divided into five minute periods, produced a maximum of 24 through between 16:05 and 16:10h. The majority of butterflies were heading more or less into the wind today and going north-east, but there were smaller numbers which continued to fly west. 191 through in an hour, would still represent an amazing Spring count, away from 2009. |
||
Recent Coleoptera at
Sherwood Forest NNR Regular visits to the Sherwood Forest area, namely Sherwood Forest CP and Budby South Forest (Birklands and Bilhaugh SSSI) and Clipstone Old Quarter (Birklands West and Ollerton Corner SSSI) have proved productive, with several new species for the site and species recorded for the first time in many years. One of the most attractive species found, has been several adults of the leaf beetle Chrysolina polita (shown right) found on low vegetation at one site in the forest. The striking Rove Beetle Ontholestes tessellatus was just one of a range species which were attracted to carrion (rarely found in the forest) at Clipstone Old Quarter. Although not entirely pleasant to deal with, carrion (a dead cat in this instance) proved to be a relative gold mine for species,which would perhaps be very difficult to find otherwise. |
...... | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Decline in the
range of Coleoptera at Sherwood Forest NNR It appears that there has been a considerable decline in the range of beetles found at Sherwood Forest NNR since the early 1900's. Based on the database of records we have built, a total of 377 species have disappeared since Carr's book was published in 1916. This is slightly compensated by the fact that 156 new species have currently been recorded on site since 2000. Climate change, forest management and public pressures created by increase use, have no doubt all contributed to the loss of many species, but with much of the forest's coleoptera being extremly small, coupled by few people actually searching and recording the forest's fauna, must mean that many species considered lost, may well yet be rediscovered. |
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Pale Pinion
taken Sherwood Forest A moth new to Nottinghamshire a couple of years ago, the Pale Pinion seems to be continuing it's recent colonisation of the county, when we recorded an adult at MV light from Sherwood Forest CP on April 10th. |
||
First record
of Hylastes ater
since early 1900's An adult Hylastes ater (a weevil of the subfamily Scolytinae) found under the bark of a section of felled Pine at Clipstone Old Quarter, was the first Sherwood Forest NNR record for around a hundred years. |
||
First Glow
Worm larva of 2009 Searching for Carabids at Clipstone Old Quarter near Edwinstowe, provided an unexpected highlight on March 9th, with an active Glow Worm larva. The larva was found under several pieces of old bark lying on slightly open ground and surrounded by a thin covering of Brambles. The larvae was around 22mm in length and was feeding on a snail when found. Searches also provided a new beetle for Sherwood Forest NNR, with a single Agonum muelleri. |
||
Two new micro
moths
for
Sherwood Forest NNR Moth trapping at various locations within Sherwood Forest during February, have resulted in two new micros for the site, with an Acleris cristana attracted to MV light on February 23rd and an Acleris hastiana on February 27th. |
||
First record
of Rhizophagus nitidulus
at
Sherwood since 1983 Whilst moth trapping, we are continuously checking nearby trunks and fallen branches for Coleoptera. This regularly proves to be productive and we recorded the first Rhizophagus nitidulus (Nationally notable Grade B) at Sherwood since 1983 on February 27th. |
||
Lesser Stag
Beetle at Eakring Meadows A male Lesser Stag Beetle (Dorcus parallelepipedus) was found under a large section of Ash, along with the Staphilinid Bolitobius cingulatus on February 26th. |
||
New Carabid for Sherwood
Forest NNR A single Notiophilus substriatus found on Budby South Forest on a sunny and mild February 21st, surprisingly represented a new species for either of the two SSSI's which make up Sherwood Forest NNR. This is a relatively common species, but which is often present in much smaller numbers than the much commoner Notiophilus biguttatus. It prefers open ground with short, sparse vegetation and is often recorded from urban areas. |
||
.... |