Olav's Wood: Invertebrates

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Invertebrates in Olav's Wood

Here are a records of invertebrates, including insects and other arthropods, and molluscs, found in the woods. Thanks to Lee Johnson and Andy Mitchell for most of these records. The unacknowledged records on this page are those from Lee Johnson's record list.

One of the recent developments illustrating the value of Olav's Wood for wildlife is that several species new to Orkney have been discovered in the woods. These are marked * below.

There is a separate butterflies and moths (Lepidoptera) page. For invertebrates in the burn, see the Fauna of Oback Burn page.

Insects

1. Hymenoptera (Bees, Wasps, Ants, etc.)

The BWARS (Bees, Wasps and Ants Recording Society) website is recommended for Hymenoptera in Britain and Ireland.

Bees

This list of bumblebee species in the woodland is supplied by Andy Mitchell:

Bombus distinguendus - Great Yellow Bumblebee
Once widespread in Britain its range has "contracted alarmingly". It is now restricted to some Hebridean islands, the north coast of Scotland and Orkney. Elsewhere it is distributed widely in the northern Palaearctic from the Atlantic to the Pacific.
Bombus lucorum - White-tailed Bumblebee
A common and widespread bumblebee (a queen was recorded in the woods by Lee Johnson, April 2015)
Bombus pascuorum - Common Carder Bee
A fairly recent incomer to Orkney and, in Britain, is extending its range northwards.
Apis mellifera - European Honey Bee (L. Johnson, April 2015)
Bombus (Megabombus) hortorum - Small Garden Bumblebee (L. Johnson, June 2015)
A widespread bumblebee in Britain.
Bombus muscorum - Moss Carder Bee (L. Johnson, on Hestily side of woodland)
An uncommon and declining bumblebee, formerly found across large parts of Britain. Its stronghold is in the north and west of Scotland, but it is found in some coastal and hill areas elsewhere.

Ants

From Lee Johnson's records (2015):
Myrmica ruginodis

Sawflies

Dolerus sp.
Pontania proxima - Willow Redgall Sawfly

Wasps

Doliuchovespula (Pseudovespula) sylvestris - Tree Wasp
Ichneumonoidea - Ichneumon Wasps
Vespula rufa - Red Wasp

2. Diptera (Flies)

From Lee Johnson's records (2014-17):
Argyra sp. - A Long-legged Fly
Beris sp. - A Soldier Fly
Beris chalybata - Murky-legged Black Legionnaire
Bibio pomonae - Red-thighed St. Mark's Fly/Heather Fly
Calliphora vicina
Chrysopilus cristatus - Black Snipefly
Dicranomyia modesta - A Crane Fly
Dolichopodidae - Long-legged Flies
Elachiptera cornuta agg. - A frit (or grass) fly (Chloropidae)
Empididae - Dagger Flies
Haematopota - A Horsefly
Hydrotaea diabolus
Lauxaniidae
Limonia nubeculosa - A Crane Fly
Limonia trivittata - A Crane Fly
Meiosimyza rorida
Muscidae - House Flies
Mesembrina meridiana - Noon Fly
* Molophilus ater - A small crane fly
A new record for Orkney (Lee Johnson, May 2016)
Ptychoptera albimana - A Phantom Crane Fly
This species is more commonly recorded in the south of Britain.
Rhypholophus varius - A Crane Fly
Scathophaga furcata - A Yellow Dung Fly
Scathophaga stercoraria - Common Yellow Dung Fly
Tabanidae - Horse Flies (on Hestily side of woodland)
Tipula maxima - A Crane Fly
The largest of the British crane flies.
Tipula oleracea - A Crane Fly
Tipula paludosa - A Crane Fly
Tipula rufina - A Crane Fly
This small crane fly, Molophilus ater, was recorded in Olav's Wood in May 2016 by Lee Johnson.
This is a new record for Orkney. This species is locally common in other parts of the UK. Adults
appear in late May or early June. Although it has wings, it is essentially flightless.
This little frit (or grass) fly (Chloropidae) was found
in leaf litter and rough grass on the edge of Olav's
Wood, Elachiptera cornuta agg. This is possibly
a first record for Orkney. Lee Johnson (March, 2017).
Red-thighed St Mark's Fly (Bibio pomonae)
photographed on Rosa rugosa leaves in
Olav's Wood in July 2016.
A Sawfly (Tenthredo sp.?) photographed in
Olav's Wood in July 2016.
Yellow Dung Fly (Scathophaga stercoraria)
photographed in Olav's Wood in July 2016.

Hoverflies

This list of hoverflies found in the woods was contributed by Lee Johnson (2015/16)

Episyrphus balteatus - Marmalade Hoverfly
Eristalis abusivus - Levels Drone Fly
Eristalis arbustorum - A Drone Fly
Eristalis intricarius - A bumblebee mimic
Eristalis pertinax - Tapered Drone Fly
Eristalis tenax - Common Drone Fly
Eupeodes corollae
Helophilus pendulus
Leucozona lucorum
Melanostoma scalare
* Melangyna lasiophthalma - A new record for Orkney (Lee Johnson 2016, see photograph below)
Platycheirus albimanus
Platycheirus granditarsus
Platycheirus manicatus
Rhingia campestris
Scaeva pyrastri (on the Hestily side of the woodland)
Sericomyia silentis
Syritta pipiens - Thick-legged Hoverfly
Syrphus sp.
Volucella bombylans - A bumblebee mimic
Xylota segnis
The hoverfly Melangyna lasiophthalma
recorded in Olav's Wood in April 2016 by
Lee Johnson. This is a new record for Orkney.
It is a Spring-flying hoverfly and was spotted
sunning itself high in a tree.
The hoverfly Rhingia campestris photographed
in a Rosa rugosa flower in Olav's Wood in July 2016.

3. Coleoptera (Beetles)

From Lee Johnson's records (2015/17):

Aphidecta obliterata - Larch Ladybird
Picture (L. Johnson) from Olav's Wood below. This is only recently (2015) recorded in Orkney, by Lee Johnson,
and records in the far north of Scotland are rare.
Aphodius (Acrossus) depressus - a Dung Beetle
Cantharis nigricans - A Soldier Beetle
This species is more commonly recorded in the south of Britain than the north.
Elaphrus riparius - An attractive, jewel-like Ground Beetle, with a distinctly southerly distribution in the UK. This is only the third record for Orkney. Pictured below.
Elateridae - Click Beetles
Gastrophysa viridula - Green Dock Beetle
Nebria brevicollis - a common Ground Beetle, sometimes called a Gazelle Beetle
* Otiorhynchus nodosus - A Weevil
Philonthus laminatus - A Rove Beetle
Rhagonycha lignosa - A Soldier Beetle
This species is more commonly recorded in the south of Britain than the north.
Staphylinidae - Rove Beetles
A Larch Ladybird recorded in Olav's Wood
- only recently (2015) discovered in Orkney.
[L. Johnson, Sept 2015]
A jewel-like Ground Beetle (Elaphrus riparius).
Magnify the image twice to see the beautifully-
patterned elytra (wing-cases). This is the
third record for Orkney for this beetle which is
more common in southern parts of the UK.
Inhabits wet areas, especially watersides.
[L. Johnson, June 2016]
A weevil (Otiorhynchus nodosus) found
by Lee Johnson (March 2017). This is a
first record for Orkney.

4. Hemiptera (Bugs)

Anthocoris nemorum - Common Flower Bug
Evacanthus interruptus - A black and yellow Leafhopper
Leptopterna ferrugata - A Grass Bug
Stenodema (Brachystira) calcarata - A Grass Bug

5. Lepidoptera (Butterflies and moths)

See the separate butterflies and moths (Lepidoptera) page.

6. Odonata (Dragonflies and damselflies)

A dragonfly was seen in Olav's Wood by Andy Mitchell (Sept 2015). Believed to be the Common Hawker (Aeshna juncea).

7. Psocoptera (Barklice, booklice, barkflies)

Graphopsocus cruciatus ? - See pictures below.
A barkfly nymph (possibly Graphopsocus cruciatus, a common species) and (second picture)
hatched barkfly eggs covered in a net of threads on the underside of a leaf in Olav's Wood.
Lee Johnson, 13th April, 2017.

Collembola - Springtails

* Dicyrtomina saundersi - A globular springtail. This is a new record for Orkney (Lee Johnson, November 2016, see the photograph below)
Tomocerus minor - A common springtail (pictures below).
A springtail (Dicyrtomina saundersi) found
by Lee Johnson on rotting twigs and in
leaf litter near the burn in Olav's Wood.
This is a first record for Orkney and the
northernmost record in the UK for
this species. The individuals are
approx. 2mm long.
A common springtail, Tomocerus minor, found in leaf litter under the trees at Olav's Wood. They are 4.5 mm long and covered in little
blueish scales as shown in the second picture. The top one has lost most of its scales so looks very yellow. Lee Johnson, March 2017.

Other arthropods

Arachnida (Spiders, Mites etc)

From Lee Johnson's records (2015):

Araneus diadematus - Garden Spider
Enoplognatha ovata sensu lato
* Larinioides cornutus - A Furrow Spider
Linyphiidae - Money Spiders
Lycosidae - Wolf Spiders
Metellina mengei - A Long-jawed Spider (Tetragnathidae)
Metellina merianae - A Long-jawed Spider (Tetragnathidae)
Photographed below in the conifers of Helen's Wood (lower Olav's Wood).
Metellina segmentata sensu lato - A Long-jawed Spider (Tetragnathidae)
Pardosa nigriceps - A Wolf Spider (on Hestily side of woodland)
Robertus lividus - A Comb-footed Spider (Theridiidae)
Tetragnatha extensa - A Long-jawed Orb-weaver Spider
Paroligolophus agrestis - A Harvestman
A Damaeidae mite - see pictures below
Mesostigmata sp.- A Mite

In May 2015, Lee Johnson recorded the furrow spider Larinioides cornutus in the woods (photograph below). This has been confirmed by Edward Milner as a first record for Orkney.

A furrow spider (Larinioides cornutus) in
Olav's Wood - a first record for Orkney.
[L. Johnson, May 2015]
A 'Long-jawed Spider'(Metellina merianae)
in the conifers of Helen's Wood.
[L. Johnson, 2015]
This is a Damaeidae mite from leaf litter in Olav's Wood. The first photograph shows it next
to the end of a pin as a size comparison. Lee Johnson, March, 2017.

Woodlice

From Lee Johnson's records (2015):

Oniscus asellus - Common Woodlouse

Molluscs

From Lee Johnson's records (Spring 2015):

Limacus maculatus - Green Cellar/Irish Yellow Slug

Flatworms (Platyhelminthes)

From Lee Johnson's records (Spring 2015):
Arthurdendyus triangulatus - New Zealand Flatworm


Trees and shrubs

Plants

Birds

Butterflies and moths

Invertebrates

Bryophytes

Fauna of the burn

Other wildlife