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earthstar

~ a celebration of nature

earthstar

Tag Archives: Aspen

Autumn trees: Aspen

09 Sunday Nov 2025

Posted by sconzani in autumn, leaves, trees

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Aspen, Aspen in autumn, autumn colour, autumn leaves, autumn trees, Populus tremula

The leaves of the Aspen (Populus tremula) are some of the most stunning autumn leaves, their summer green changing to yellow and orange and red and every combination of those colours, sometimes all in one leaf. Those colours, together with the way the leaves of the Aspen seem to quiver and rustle (tremula is Latin for trembling or quaking) at the merest hint of a breeze, make this tree a favourite of mine – and I’m sure with many of you, as well.

Aspen are usually associated with cold places, growing best in mountains near rivers – they prefer moist but well-drained soil, so coastal south Wales is not their preferred habitat but, for some reason, they seem often to be used in ornamental plantings in parks and alongside roads, in the landscaping around business and housing developments, so these are the Aspens I’m most familiar with. Some day I’d like to make an autumn trip to a place where Aspen are at their most spectacular – I’ve read the trees in the north west of Scotland put on a particularly fine autumn display.

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Leafmines: Ectoedemia argyropeza

11 Monday Nov 2024

Posted by sconzani in autumn, insects, leaves, trees

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Aspen, British leafmines, Ectoedemia argyropeza, leaf-mining moth larvae, leafmines on Aspen

The new leafmines are coming thick and fast this year, not because my skills are improving but rather because I’m following the right people on social media and take my inspiration for searching from what they’re finding.

241111 Ectoedemia argyropeza (1)

Today’s leafmines, made by the larvae of the moth Ectoedemia argyropeza, can be found on Aspen (Populus tremula) between July and November. They are easier to spot later in the season when the leaves turn brown and begin to fall as the mines cause the surrounding leaf area to remain green – the so-called ‘green islands’ that some moth species have the ability to create through the chemicals they secrete, which allows them to continue feeding in their portion of the leaf. The other thing to look for with these miners is the brown mark in the leaf petiole, where the mine originated.

241111 Ectoedemia argyropeza (2)

Though I don’t often bring home the mines I find, in this instance I had been unable to get good photos along the busy road so brought home one leaf. I temporarily forgot about the leaf for a couple of days and , when I opened the little pot it was in, found the larva had left the mine so I am also able to show you what it looks like, below.

241111 Ectoedemia argyropeza (3)

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Leafmines: Aulagromyza tremulae

07 Monday Oct 2024

Posted by sconzani in insects, trees

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Aspen, Aulagromyza tremulae, leaf-mining flies, leaf-mining fly larvae, leafmines on Aspen, leafmines on Black poplar

I don’t find many leafmines on Aspen, probably because there aren’t a lot of Aspen trees growing locally. Also, I haven’t been finding many mines made by creatures other than moths but today’s find is an exception, as these silvery meandering gallery mines on Aspen leaves were made by the larva of the tiny fly Aulagromyza tremulae.

241007 Aulagromyza tremulae (1)

If I hadn’t been doing a spot of leaf-turning, I could easily have missed these mines, as they are almost exclusively made in the lower surface of the leaf (see images below showing the lower and upper leaf surfaces). This is one of the characteristics that distinguishes these mines from those of other species, though Barry Warrington, who runs the National Agromyzidae Recording Scheme and website, discovered this wasn’t always the case when he recently bred Aulagromyza tremulae flies from upper surface mines. (Barry has confirmed the identity of the mines pictured here, fortunately.)

241007 Aulagromyza tremulae (2)

This little fly has two broods per year, so mines can be found on Aspen (Populus tremula), and also on Black poplar (Populus nigra), in the early summer and again in early autumn. I haven’t managed to find any images of the adult fly so maybe I should try to breed one through to see what they look like. If that happens, there’ll definitely be a show-and-tell post.

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About me

sconzani

sconzani

I'm a writer and photographer; researcher and blogger; birder and nature lover; countryside rambler and city strider; volunteer and biodiversity recorder.

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