The Cairngorms Up-Close: Gallery



Category: GALLS


Ergot (Claviceps purpurea)

Claviceps purpurea

Where and when encountered: Abernethy Forest on 2 August 2025

About: Ergot is a gall caused by the fungus Claviceps purpurea and can be found throughout Great Britain as distorted seeds of various wild grasses, including cock's-foot and red fescue.


Scots pine blister rust (Cronartium flaccidum)

Cronartium flaccidum

Where and when encountered: Anagach Woods on 17 June 2021

About: Records of Scots pine blister rust in the NBN Atlas are mostly restricted to Strathspey and Easter Ross in the Scottish Highlands.


Hawthorn–carrot aphid gall (Dysaphis crataegi agg)

Dysaphis crataegi agg

Where and when encountered: Grantown-on-Spey on 17 June 2021

About: The 'hawthorn–carrot aphid' is a name given to a cluster of very closely related species. In all species, the aphids develop in galls on the foliage of hawthorns, their primary host, and then disperse to various umbellifers, including wild carrot. The galls can be found in various parts of Great Britain.


Willow sawfly gall (Euura pedunculi)

Euura pedunculi

Where and when encountered: Glenbeg on 13 September 2025

About: This gall on eared willow is the work of the sawfly Euura pedunculi, a species found in many corners of Great Britain.


Exobasidium splendidum

Exobasidium splendidum

Where and when encountered: Anagach Woods on 27 May 2026

About: Exobasidium splendidum is a rarely encountered fungal galler of cowberry. All records for the species in the NBN Atlas are from northern Scotland.

Editor's note: I am somewhat confident here of the species identification of this gall on cowberry.


Cowberry redleaf gall (Exobasidium vaccinii)

Exobasidium vaccinii

Where and when encountered: Sluggan (Carrbridge) on 8 July 2022

About: Cowberry redleaf is a fungus-induced gall in which leaves of the host-plant turn red and develop into a cup-shape. The fungus responsible can also cause galls to form on other parts of cowberry and, in addition, can affect some other plant species, including crowberry.


Gymnosporangium clavariiforme

Gymnosporangium clavariiforme

Where and when encountered: Carrbridge golf course on 2 September 2021

About: This galled haw was most probably caused by the fungus Gymnosporangium clavariiforme. The alternate stage in the life-cycle of this widely scattered fungus occurs as conspicuous orange protuberances on common juniper known as 'tongues of fire'.

Editor's note: The gall key that I use suggests that it cannot be definitively stated that this gall was the work of Gymnosporangium clavariiforme, with G. confusum also being a possible agent.


Tongues of fire (Gymnosporangium clavariiforme telial)

Gymnosporangium clavariiforme telial

Where and when encountered: Glenfeshie on 28 April 2023

About: The alternate stage in the life-cycle of this widely scattered fungus occurs on hawthorn.


Rowan crown gall (Gymnosporangium cornutum)

Gymnosporangium cornutum

Where and when encountered: Nethy Bridge on 26 August 2021

About: This fungal gall is a relatively common sight on rowan trees in the Scottish Highlands but rarely encountered elsewhere in Great Britain.


Melampsora caprearum

Melampsora caprearum

Where and when encountered: Blair Atholl on 21 June 2026

About:


Microbotryum bistortarum

Microbotryum bistortarum

Where and when encountered: Tulloch on 8 June 2025

About: The spore-releasing galls in the photograph are the work of the fungus Microbotryum bistortarum, a little-recorded species in Great Britain.


Spangle gall (Neuroterus quercusbaccarum agamic)

Neuroterus quercusbaccarum agamic

Where and when encountered: Grantown-on-Spey on 7 September 2022

About: Spangle galls are formed on the leaves of oak trees by the agamic generation of wasps in the species Neuroterus quercusbaccarum. The sexual generation of these wasps is responsible for currant galls, also on oaks. The Scottish Highlands are one of the larger parts of the species' patchy distribution in Great Britain, at least judging by records available through the NBN Atlas.


Rose rust (Phragmidium mucronatum)

Phragmidium mucronatum

Where and when encountered: Grantown-on-Spey on 8 July 2025

About: These bright-orange aecia are produced by the gall-causing rust fungus Phragmidium mucronatuma species whose different life-stages are all associated with roses.


Violet bramble rust (Phragmidium violaceum)

Phragmidium violaceum

Where and when encountered: Kingussie on 19 August 2025

About: Violet bramble rust is a gall caused by the fungus Phragmidium violaceum and may be encountered on bramble leaves in most corners of Great Britain.


Phyllocoptes sorbeus

Phyllocoptes sorbeus

Where and when encountered: Strath Mashie on 18 August 2025

About: These galls on rowan leaves are the work of the mite Phyllocoptes sorbeus, a species with a scattered distribution in Great Britain.


Ground-elder rust (Puccinia aegopodii)

Puccinia aegopodii

Where and when encountered: Dulnain Bridge on 16 May 2026

About: These galls are a fungal rust on ground-elder. The species can be found in in various corners of Great Britain.


Puccinia urticata

Puccinia urticata

Where and when encountered: Grantown-on-Spey on 17 June 2021

About: The distortion of nettle stems and leaves caused by the fungus Puccinia urticata can be remarkable in nature. The Scottish Highlands are one of the areas of Great Britain where these galls are most commonly found.

Editor's note: In the photograph, numerous fruiting bodies – from which spores disperse – are clearly visible.


Pucciniastrum pyrolae

Pucciniastrum pyrolae

Where and when encountered: Abernethy Forest on 17 November 2025

About: The darkened reddish splotches on the leaf of a wintergreen (Pyrola) are the work of the rust fungus Pucciniastrum pyrolae, a species with a scattered distribution in Great Britain.

Editor's note: I am somewhat confident of this species identification.

Years with at least one adult record: 2025 (1)


Ramularia ulmariae

Ramularia ulmariae

Where and when encountered: Grantown-on-Spey on 19 June 2026

About: These galls on meadowsweet are the work of the fungus Ramularia ulmariae. The species may be encountered in various corners of Great Britain.

Years with at least one adult record: 2026 (1)


Alder tongue gall (Taphrina alni)

Taphrina alni

Where and when encountered: Nethy Bridge on 16 August 2021

About: These fungus-caused galls of the female catkins of alder trees can develop into tongue-like protuberances. They can be found in various parts of Great Britain.


Birch besom (Taphrina betulina)

Taphrina betulina

Where and when encountered: Grantown-on-Spey on 23 November 2025

About: The fungus Taphrina betulina causes masses of densely branched twigs to from on birch trees. The species can be found from the far north to the far south of Great Britain.

Editor's note: I cannot state definitively that Taphrina betulina was the cause of the gall photographed on birch here, as it is possible that there was some other agent.


Bird cherry pocket (Taphrina padi)

Taphrina padi

Where and when encountered: Milton Loch on 22 June 2024

About: This pocket gall on bird cherry is the work of the fungus Taphrina padi. The galls can be found in various corners of Great Britain.


Pocket plum (Taphrina pruni)

Taphrina pruni

Where and when encountered: Blair Atholl on 20 June 2026

About: This gall of a sloe is the work of the fungus Taphrina pruni, a species found in various corners of Great Britain.


Meadowsweet rust (Triphragmium ulmariae)

Triphragmium ulmariae

Where and when encountered: Nethy Bridge on 12 June 2026

About: This gall on a meadowsweet leaf is the work of the fungus Triphragmium ulmariae, a species found in many corners of Great Britain.


Geranium rust (Uromyces geranii)

Uromyces geranii

Where and when encountered: Blair Atholl on 13 June 2026

About: These galls on a wood crane's-bill leaf are caused by the fungus Uromyces geranii. The organism may be encountered galling numerous species of geranium in various corners of Great Britain.


Acalitus brevitarsus

Group: ARTHROPOD-CAUSED GALLS

Acalitus brevitarsus

Where and when encountered: Grantown-on-Spey on 6 June 2026

About: This gall, on an alder leaf, is the work of the mite Acalitus brevitarsus, a widespread species in Great Britain.


Birch mite gall (Acalitus longisetosus)

Group: ARTHROPOD-CAUSED GALLS

Acalitus longisetosus

Where and when encountered: Anagach Woods on 17 June 2021

About: Maps of records within Great Britain suggest that these mite-produced galls of birch leaves are most often encountered in the Scottish Highlands.


Acalitus rudis

Group: ARTHROPOD-CAUSED GALLS

Acalitus rudis

Where and when encountered: Anagach Woods on 27 May 2026

About: This gall, on a birch leaf, is the work of the mite Acalitus rudis. Just over half of recent records for the species in the NBN Atlas are from the Scottish Highlands.


Cauliflower mite gall (Aceria fraxinivora)

Group: ARTHROPOD-CAUSED GALLS

Aceria fraxinivora

Where and when encountered: Boat of Garten on 28 August 2025

About: These galls on ash inflorescences are the work of the mite Aceria fraxinivora – a species, going by records in the NBN Atlas, with a rather patchy distribution in Great Britain.


Aceria nalepai

Group: ARTHROPOD-CAUSED GALLS

Aceria nalepai

Where and when encountered: Abernethy Forest on 28 October 2021

About: These galls on alder leaves are the work of the mite Aceria nalepai, a species found throughout Great Britain.


Sycamore felt gall (Aceria pseudoplatani agg)

Group: ARTHROPOD-CAUSED GALLS

Aceria pseudoplatani agg

Where and when encountered: Grantown-on-Spey on 8 September 2025

About: These galls on a sycamore leaf are the work of the mite Aceria pseudoplatani, a species aggregate found in many corners of Great Britain.


Cooley spruce gall (Adelges cooleyi)

Group: ARTHROPOD-CAUSED GALLS

Adelges cooleyi

Where and when encountered: Nethy Bridge on 5 August 2024

About: Cooley spruce galls are caused by adelgid bugs of the species Adelges cooleyi. This insect has alternate generations, one on spruces and the other on Douglas fir. Most records for the species in Great Britain are from the Scottish Highlands.


Larch adelgid gall (Adelges laricis)

Group: ARTHROPOD-CAUSED GALLS

Adelges laricis

Where and when encountered: Abernethy Forest on 22 May 2026

About: This gall, on spruce, is the work of the larch adelgid, a species of true bug with a life-cycle that alternates between spruces and larches. Most records for the species in the NBN Atlas are from the Scottish Highlands.


Artichoke gall (Andricus foecundatrix)

Group: ARTHROPOD-CAUSED GALLS

Andricus foecundatrix

Where and when encountered: Highland Wildlife Park on 13 August 2025

About: This gall on an oak bud is the work of the wasp Andricus foecundatrix, a species found in various corners of Great Britain.


Marble gall (Andricus kollari)

Group: ARTHROPOD-CAUSED GALLS

Andricus kollari

Where and when encountered: Tomintoul on 2 September 2025

About: These galls on oak buds are the work of the wasp Andricus kollari, a species found in most parts of Great Britain.


Knopper gall (Andricus quercuscalicis)

Group: ARTHROPOD-CAUSED GALLS

Andricus quercuscalicis

Where and when encountered: Grantown-on-Spey on 7 September 2022

About: Knopper galls are chemically induced distortions of acorns caused by gall wasps of the species Andricus quercuscalicis, and they can be found in various corners of Great Britain.


Anisostephus betulinus

Group: ARTHROPOD-CAUSED GALLS

Anisostephus betulinus

Where and when encountered: Grantown-on-Spey on 9 July 2022

About: These galls on birch leaves are the work of a midge. The midge larvae leave the galls between July and September. The Great British distribution of the species is not especially clear, on account of limited recording.


Rose leaf-roller sawfly gall (Blennocampa phyllocolpa)

Group: ARTHROPOD-CAUSED GALLS

Blennocampa phyllocolpa

Where and when encountered: Grantown-on-Spey on 5 June 2026

About: This gall on a rose leaflet is the work of the sawfly Blennocampa phyllocolpa. The species can be found in many corners of Great Britain.


Cecidophyopsis betulae

Group: ARTHROPOD-CAUSED GALLS

Cecidophyopsis betulae

Where and when encountered: Grantown-on-Spey on 5 June 2026

About: The galls photographed, on a birch leaf, are the work of the mite Cecidophyopsis betulae. Most records of the species in Great Britain come from the Scottish Highlands.


Contarinia petioli

Group: ARTHROPOD-CAUSED GALLS

Contarinia petioli

Where and when encountered: Grantown-on-Spey on 17 May 2025

About: The galls photographed, in the petiole of an aspen leaf, are the work of the midge Contarinia petioli. Most records of the species in Great Britain come from the Scottish Highlands.


Contarinia tiliarum

Group: ARTHROPOD-CAUSED GALLS

Contarinia tiliarum

Where and when encountered: Blair Castle grounds on 21 June 2026

About:


Redcurrant aphid gall (Cryptomyzus ribis)

Group: ARTHROPOD-CAUSED GALLS

Cryptomyzus ribis

Where and when encountered: Carrbridge on 17 June 2026

About: This gall on a redcurrant leaf is the work of the aphid Cryptomyzus ribis. Blackcurrant and gooseberry, in addition to redcurrant, are primary hosts for this host-alternating insect, while secondary hosts include henbit dead-nettle and white dead-nettle. The species may be encountered in various corners of Great Britain.

Editor's note: An aphid of the species responsible for the gall can be seen in the photograph.


Cynips agama

Group: ARTHROPOD-CAUSED GALLS

Cynips agama

Where and when encountered: Glenbeg on 22 September 2025

About: This gall on an oak leaf is the work of the wasp Cynips agama. The species is somewhat uncommon in Great Britain, and records in the NBN Atlas are too few in number to comment with any confidence on the geographical distribution.


Red-pea gall (Cynips divisa)

Group: ARTHROPOD-CAUSED GALLS

Cynips divisa

Where and when encountered: Glenbeg on 22 September 2025

About: These galls on an oak leaf are the work of the wasp Cynips divisa, a species with a scattered distribution in Great Britain.


Striped pea gall (Cynips longiventris)

Group: ARTHROPOD-CAUSED GALLS

Cynips longiventris

Where and when encountered: Tomintoul on 2 September 2025

About: This galls on an oak leaf is the work of the wasp Cynips longiventris, a species found in many parts of Great Britain.


Dasineura fraxini

Group: ARTHROPOD-CAUSED GALLS

Dasineura fraxini

Where and when encountered: Killiecrankie on 20 June 2026

About: This gall on an ash leaf is the work of the gall midge Dasineura fraxini. The species can be found in various corners of Great Britain.


Dasineura rosae

Group: ARTHROPOD-CAUSED GALLS

Dasineura rosae

Where and when encountered: Grantown-on-Spey on 9 June 2026

About: This gall, on a rose leaflet, is the work of the midge Dasineura rosae. The species may be encountered in various corners of Great Britain.


Dasineura tiliae

Group: ARTHROPOD-CAUSED GALLS

Dasineura tiliae

Where and when encountered: Blair Castle grounds on 21 June 2026

About:


Dasineura ulmaria

Group: ARTHROPOD-CAUSED GALLS

Dasineura ulmaria

Where and when encountered: Blair Atholl on 13 June 2026

About: These galls on a meadowsweet leaf are the work of the midge Dasineura ulmaria. The species may be encountered from the far north to the far south of Great Britain.


Dasineura urticae

Group: ARTHROPOD-CAUSED GALLS

Dasineura urticae

Where and when encountered: Nethy Bridge on 25 August 2022

About: Distortions to the leaves of nettle caused by the gall mite Dasineura urticae may be encountered from the far north to the far south of Great Britain.


Robin's pin-cushion (Diplolepis rosae)

Group: ARTHROPOD-CAUSED GALLS

Diplolepis rosae

Where and when encountered: Nethy Bridge on 25 August 2022

About: Robin's pin-cushion galls (also known as 'bedeguar galls') are caused by the gall wasp Diplolepis rosae and can be found on wild roses throughout much of Great Britain.


Eriophyes arianus

Group: ARTHROPOD-CAUSED GALLS

Eriophyes arianus

Where and when encountered: Grantown-on-Spey on 22 September 2025

About: These galls on a common whitebeam leaf are the work of the mite Eriophyes arianus. Records in the NBN Atlas are too few in number to comment with any confidence on the species' geographical distribution in Great Britain.


Eriophyes distinguendus

Group: ARTHROPOD-CAUSED GALLS

Eriophyes distinguendus

Where and when encountered: Nethy Bridge on 23 August 2025

About: This gall on the leaf of a bird cherry is the work of the mite Eriophyes distinguendus. Based on the limited records in the NBN Atlas, this would appear to be a species primarily found in the Scottish Highlands.


Eriophyes diversipunctatus

Group: ARTHROPOD-CAUSED GALLS

Eriophyes diversipunctatus

Where and when encountered: Balliefurth Farm on 20 June 2022

About: Almost all records in the NBN Atlas of the mites responsible for these aspen galls come from the upper Spey valley in the Scottish Highlands.


Eriophyes exilis

Group: ARTHROPOD-CAUSED GALLS

Eriophyes exilis

Where and when encountered: Nethy Bridge on 12 June 2026

About: These gall on a lime leaf is the work of the mite Eriophyes exilis, a species found in various corners of Great Britain.


Eriophyes laevis

Group: ARTHROPOD-CAUSED GALLS

Eriophyes laevis

Where and when encountered: Carrbridge golf course on 2 September 2021

About: These galls on alder leaves are most probably the work of the mite Eriophyes laevis, a species found throughout Great Britain.

Editor's note: The gall key that I use suggests that the identification of any gall mite on Alnus is tentative only without examination of the mite.


Eriophyes leionotus

Group: ARTHROPOD-CAUSED GALLS

Eriophyes leionotus

Where and when encountered: Grantown-on-Spey on 28 May 2026

About: These galls on a birch leaf are the work of Eriophyes leionotus mites. The species may be encountered in various corners of Great Britain.

Years with at least one adult record: 2026 (1)


Eriophyes pyri

Group: ARTHROPOD-CAUSED GALLS

Eriophyes pyri

Where and when encountered: Anagach Woods on 21 May 2026

About: These galls on rowan leaves are the work of the mite Eriophyes pyri, a species with a scattered distribution in Great Britain. This species of mite also causes galls on pear trees.


Eriophyes similis

Group: ARTHROPOD-CAUSED GALLS

Eriophyes similis

Where and when encountered: Grantown-on-Spey on 12 August 2025

About: These galls on blackthorn leaves are the work of the mite Eriophyes similis, a species found in many corners of Great Britain.


Elm–currant aphid gall (Eriosoma ulmi)

Group: ARTHROPOD-CAUSED GALLS

Eriosoma ulmi

Where and when encountered: Grantown-on-Spey on 30 May 2026

About: This gall on elm is the work of the aphid Eriosoma ulmi, a species with a host-alternating life history that also entails a stage feeding on the thin roots of currants. The galls may be encountered in many corners of Great Britain.


Geocrypta galii

Group: ARTHROPOD-CAUSED GALLS

Geocrypta galii

Where and when encountered: Rothiemurchus Estate on 23 June 2024

About: These galls are the work of the gall midge Geocrypta galii, a species known from various corners of Great Britain.


Harmandiola cavernosa

Group: ARTHROPOD-CAUSED GALLS

Harmandiola cavernosa

Where and when encountered: Grantown-on-Spey on 10 June 2026

About: This gall, on an aspen leaf, is the work of the midge Harmandiola cavernosa. Based on the limited records in the NBN Atlas, this would appear to be a species primarily found in the Scottish Highlands.

Editor's note: The gall key that I use suggests that it cannot be definitively stated that this gall was the work of Harmandiola cavernosa, with the rare H. populi also being a possible agent.


Harmandiola tremulae

Group: ARTHROPOD-CAUSED GALLS

Harmandiola tremulae

Where and when encountered: Grantown-on-Spey on 10 August 2023

About: These galls, the work of the midge species Harmandiola tremulae, form on the leaves of aspen trees and can be found in various corners of Great Britain.


Hairy beech gall (Hartigiola annulipes)

Group: ARTHROPOD-CAUSED GALLS

Hartigiola annulipes

Where and when encountered: Anagach Woods on 2 August 2024

About: Hairy beech galls – not all of which are markedly pubescent – are the work of midges in the species Hartigiola annulipes. Like the host tree, beech, they can be found in most parts of Great Britain.


Jaapiella veronicae

Group: ARTHROPOD-CAUSED GALLS

Jaapiella veronicae

Where and when encountered: Blair Castle grounds on 21 June 2026

About:


Lasioptera populnea

Group: ARTHROPOD-CAUSED GALLS

Lasioptera populnea

Where and when encountered: Grantown-on-Spey on 9 June 2026

About: This gall, on an aspen leaf, is the work of the midge Lasioptera populnea. Based on the limited records in the NBN Atlas, this would appear to be a species primarily found in the Scottish Highlands.


Macrodiplosis pustularis

Group: ARTHROPOD-CAUSED GALLS

Macrodiplosis pustularis

Where and when encountered: Anagach Woods on 17 September 2025

About: Gall midges of the species Macrodiplosis pustularis cause characteristic folds to form on the lobes of oak leaves. The galls can be found in various corners of Great Britain.


Macrodiplosis roboris

Group: ARTHROPOD-CAUSED GALLS

Macrodiplosis roboris

Where and when encountered: Anagach Woods on 29 August 2024

About: Gall midges of the species Macrodiplosis roboris cause characteristic folds to form between the lobes of oak leaves. The galls can be found in various corners of Great Britain.


Miarus campanulae

Group: ARTHROPOD-CAUSED GALLS

Miarus campanulae

Where and when encountered: Abernethy Forest on 1 August 2025

About: This gall on a harebell flower is the work of the true weevil Miarus campanulae, a species with a much higher abundance in the southern half than the northern half of Great Britain.


Oyster gall (Neuroterus anthracinus)

Group: ARTHROPOD-CAUSED GALLS

Neuroterus anthracinus

Where and when encountered: Dulnain Bridge on 11 October 2025

About: These flaps on the midrib of an oak leaf are the remains of shed oyster galls – the work of gall wasps in the species Neuroterus anthracinus.


Silk-button gall (Neuroterus numismalis)

Group: ARTHROPOD-CAUSED GALLS

Neuroterus numismalis

Where and when encountered: Glenbeg on 22 September 2025

About: These galls on an oak leaf are the work of the wasp Neuroterus numismalis, a species found in many parts of Great Britain.


Currant gall (Neuroterus quercusbaccarum)

Group: ARTHROPOD-CAUSED GALLS

Neuroterus quercusbaccarum

Where and when encountered: West Port near Cromdale on 4 June 2022

About: Currant galls are formed on the flowers and foliage of oak trees by the sexual generation of wasps in the species Neuroterus quercusbaccarum. The agamic generation of these wasps is responsible for spangle galls, also on oaks. The Scottish Highlands are one of the larger parts of the species' patchy distribution in Great Britain, at least judging by records available through the NBN Atlas.


Phyllocoptes eupadi

Group: ARTHROPOD-CAUSED GALLS

Phyllocoptes eupadi

Where and when encountered: Nethy Bridge on 30 May 2022

About: These galls, on bird cherry, are the work of mites in the species Phyllocoptes eupadi. They can be found in various corners of Great Britain.


Phyllocoptes populi

Group: ARTHROPOD-CAUSED GALLS

Phyllocoptes populi

Where and when encountered: Abernethy Forest on 7 June 2026

About: These galls, on an aspen leaf, are the work of Phyllocoptes populi mites, a species found in various corners of Great Britain.


Phytoptus avellanae

Group: ARTHROPOD-CAUSED GALLS

Phytoptus avellanae

Where and when encountered: Grantown-on-Spey on 2 June 2026

About: This expanded hazel bud is a gall caused by the mite species Phytoptus avellanae. The galls may be encountered in many corners of Great Britain.


Psyllopsis fraxini agg

Group: ARTHROPOD-CAUSED GALLS

Psyllopsis fraxini agg

Where and when encountered: Grantown-on-Spey on 20 June 2024

About: This gall on ash is the work of a jumping plant louse belonging to the Psyllopsis fraxini species aggregate. These jumping plant lice can be found in various corners of Great Britain.


Rabdophaga marginemtorquens

Group: ARTHROPOD-CAUSED GALLS

Rabdophaga marginemtorquens

Where and when encountered: Highland Wildlife Park on 13 August 2025

About: These galls on osier leaves are the work of the midge Rabdophaga marginemtorquens, a species with a scattered distribution in Great Britain.


Pine resin gall (Retinia resinella)

Group: ARTHROPOD-CAUSED GALLS

Retinia resinella

Where and when encountered: Sluggan (Carrbridge) on 15 June 2025

About: This gall on Scots pine is the work of the moth Retinia resinella, a species with a scattered distribution in Great Britain that includes much of the eastern Scottish Highlands.


Taxomyia taxi

Group: ARTHROPOD-CAUSED GALLS

Taxomyia taxi

Where and when encountered: Blair Castle grounds on 21 June 2026

About:


Fig gall (Tetraneura ulmi)

Group: ARTHROPOD-CAUSED GALLS

Tetraneura ulmi

Where and when encountered: Grantown-on-Spey on 25 May 2025

About: The fig gall is produced on elm leaves by the aphid Tetraneura ulmi.


Trioza remota gall

Group: ARTHROPOD-CAUSED GALLS

Trioza remota gall

Where and when encountered: Blair Atholl on 24 September 2025

About: This gall on an oak leaf is the work of a jumping plant louse belonging to the species Trioza remota. This insect can be found in various corners of Great Britain.


Pine bud mite gall (Trisetacus pini)

Group: ARTHROPOD-CAUSED GALLS

Trisetacus pini

Where and when encountered: Grantown-on-Spey on 28 May 2022

About: Within Great Britain, these mite-caused galls of young pine branches are restricted almost entirely to the Scottish Highlands.


Juniper berry mite gall (Trisetacus quadrisetus)

Group: ARTHROPOD-CAUSED GALLS

Trisetacus quadrisetus

Where and when encountered: Abernethy Forest on 17 November 2025

About: This gall of a juniper 'berry' is the work of Trisetacus quadrisetus. At the time of writing, there is not a single record of this galling mite in the NBN Atlas, and so it is not possible to comment on the species' distribution within Great Britain.


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