Description


A diary of my mothing activity covering highlights and photos from my moth trapping activities. Mainly Norfolk (UK), occasionally beyond. I may mention other wildlife sightings here, especially insects, but for birds see my birding diary.

Wednesday 24 March 2021

Review of 2019 and 2020 - Moths: Geometers (Geometridae) - part 10: Thorns and March Moth (Apeira to Alosphila)

GEOMETERS (GEOMETRIDAE) (continued)


Lilac Beauty Apeira syringaria - 4 caught here between 23rd June and 10th July 2019.  I've had between 4 and 7 each year I've lived here until 2020 when I didn't catch any here.  Of the 37 Lilac Beauties I've ever seen only 2 have been away from one or other of my homes and one of those was my only Lilac Beauty in 2020, at Bintree Wood on 26th June.


Large Thorn Ennomos autumnaria - None.  This species (which I've never seen) appears to be reasonably common in some parts of the far west of the county but pretty scarce elsewhere.  There are a few records in mid Norfolk though, so I'd like to think I might catch one locally some day.


August Thorn Ennomos quercinaria - None.  This must be one of the commonest moths that I've not seen yet and although they're not as common round here as they are in parts of Norwich there are quite a few records from nearby - including one in my neighbouring tetrad in 2019 (this side of Brisley I think).


Canary-shouldered Thorn Ennomos alniaria - Totals of 8 here between 9th August and 9th September 2019 and 17 between 19th July and 13th September 2020.  2019 was my worst year so far but 2020 was pretty average.  Elsewhere just one at Row Heath (West Runton) on 31st August 2019.

Canary-shouldered Thorn, North Elmham, 26th July 2020



Dusky Thorn Ennomos fuscantaria - Totals of 23 here between 28th July and 22nd September 2019 and 55 between 23rd July and 18th September 2020.  Average here is about 41 a year.  Elsewhere 3 next door, 8 at the meadows and 5 at Whitwell Street.

Dusky Thorn, North Elmham Cathedral Meadows, 15th September 2019



September Thorn Ennomos erosaria - None. I've never seen this species but there are a few records in mid Norfolk so it may turn up here sometime.  Much less chance of this than August Thorn though, and I can't even manage to catch one of them.


Early Thorn Selenia dentaria - In the spring generation totals of 8 between 21st March and 23rd April 2019 and 13 between 14th March and 18th April 2020. In summer at least 58 (but not counted on 3 dates) between 5th July and 1st August 2019 and 20 between 25th June and 30th July 2020.  2020's total of 33 was my lowest in 6 years and around half the average.  Elsewhere just one at the meadows on 18th March 2019 and on in Hellesdon.

Early Thorn, North Elmham Cathedral Meadows, 18th March 2019



Purple Thorn Selenia tetralunaria - Only 2 at home in 2019, on 24th and 26th July, fewer than I've caught in the past (3 for the last couple of years, 8 in each of the previous 2 years).  A more typical 5 here between 5th and 27th July 2020.  Elsewhere spring generation singles at the meadows and Sculthorpe Moor on 22nd and 26th April 2019.

Purple Thorn, North Elmham Cathedral Meadows, 22nd April 2019


Purple Thorn, North Elmham, 10th July 2020


Purple Thorn, North Elmham, 27th July 2020



Scalloped Hazel Odontopera bidentata - Totals of 9 caught here between 17th and 30th May 2019 and 5 betweeen 3rd and 26th May 2020.  These were my joint highest and my lowest annual totals in the 6 years I've been here.  Elsewhere one at the meadows and one at Hills and Holes and then caterpillars in October 2020 which I believe to be this species - one at Penberth in Cornwall on 7th and one at the meadows on 30th, both on Ivy.

Scalloped Hazel, North Elmham, 17th May 2019


Scalloped Hazel, North Elmham Cathedral Meadows, 17th May 2020


Scalloped Hazel, North Elmham, 26th May 2020


Scalloped Hazel caterpillar, Penberth, 7th October 2020



Scalloped Hazel caterpillar, North Elmham Cathedral Meadows, 30th October 2020



Scalloped Oak Crocallis elinguaria - At least 35 trapped in the garden between 7th July and 11th August 2019; even allowing for a couple of nights when they weren't counted this was probably my worst total here and certainly below the average of 47 a year.  2020 made up for it with 65 between 30th June and 5th August.  Elsewehere one at the meadows and 6 at Brancaster.

Scalloped Oak, North Elmham, 30th June 2020



Swallow-tailed Moth Ourapteryx sambucaria - Singles caught at home on 7 dates between 24th June and 17th July 2019, making it my worst year here so far (I average 19 a year), and 10 between 13th June and 5th July 2020 plus a late second generation individual on 20th October (my second October record following one in 2014).  A few elsewhere: 2 at the meadows, 2 at Hellesdon and one at Weybourne.

Swallow-tailed Moth, North Elmham, 29th June 2019


Swallow-tailed Moth, North Elmham, 13th June 2020


Swallow-tailed Moth, North Elmham Cathedral Meadows, 23rd June 2020


Swallow-tailed Moth, North Elmham, 20th October 2020



Feathered Thorn Colotois pennaria - 30 in my garden between 19th October and 24th November 2019 and 35 between 10th October and 13th November 2020.  These weren't quite my worst annual totals but were well below the average of 45.  Elsewhere 2 at the meadows.

Feathered Thorn, North Elmham, 21st October 2019


Feathered Thorn, North Elmham Cathedral Meadows, 8th November 2020


Feathered Thorn, North Elmham, 9th November 2020



March Moth Alsophila aescularia - 17 between 7th February and 1st April 2019 and 12 between 14th February and 25th March 2020.  These were my worst 2 years in 6 but so far 2021 has been one of my best.  Elsewhere 4 at the meadows on 20th March 2019, another in 2020 and one at Lynford.

March Moth, North Elmham, 7th February 2019


March Moth, North Elmham Cathedral Meadows, 20th March 2019


Next page: more Geometridae

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