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Juha Pöyry

@poyryjuha.bsky.social

130 followers 78 following 82 posts

Biologist (PhD) - interests ecology, entomology, conservation biology, global change

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Juha Pöyry @poyryjuha.bsky.social · Oct 1

New report presenting the main 30-yr results (1993-2022) of the Finnish moth monitoring scheme has been published:
www.sttinfo.fi/tiedote/7035...

Number of moths has remained stable for 30 years, but the species have changed significantly | Suomen ympäristökeskus

The 30th anniversary report of the national Nocturna moth monitoring, coordinated by the Finnish Environment Institute (Syke) and launched in 1993, presents the history, background and changing specie...

www.sttinfo.fi

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Juha Pöyry @poyryjuha.bsky.social · 23h

Much needed phylogeny of N European Noctuid moths published!

RES Publications @respublications.bsky.social · 1d

New research in #RESSystematicEnt

Elaborating the #phylogeny of #Noctuidae by focusing on relationships between northern European taxa
doi.org/10.1111/syen.70010

#Phylogenomics
@gkergoat.bsky.social @wiley.com

Reposted by Juha Pöyry

Butterfly Conservation Europe @europebutterfly.bsky.social · 2d

In the new European butterfly Red List, 8 sp are threatened in Scandinavian tundra where the climate crisis is causing warmer + drier conditions that allows scrub to spread on sensitive bog and open habitats. eg Agriades aquilo; Boloria freija; Euphydryas iduna. www.bc-europe.eu/webpage.php?...

Agriades aquilo, Arctic Blue (Photo: Nils Ryrholm)

Boloria freija, Freia's Fritillary (Photo: Nils Ryrholm)

Euphydryas iduna, Lapland Fritillary (Photo: Nils Ryrholm)

Overgrown bog habitat as a result of climate warming (Photo: Nils Ryrholm)

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Juha Pöyry @poyryjuha.bsky.social · 3d

Kuusen sopimattomuus lämpenevään ilmastoon on tiedetty jo ainakin 20 vuotta. Outoa ettei tähän ole reagoitu.

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Reposted by Juha Pöyry

Maija Karala @maijakarala.bsky.social · 3d

October moths

Even now it’s not too late to cling to the last remnants of summer and go looking for moths. These are some of the species that can still be seen in Finland & elsewhere in Northern Europe, drawn after my own photos.

Top view illustrations of six species of geometer moths. They all have intricate patterns and different colours: moss green, grey and pale pink, rufous and tan, cold grey, warm orange-brown.

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Reposted by Juha Pöyry

Butterfly Conservation Europe @europebutterfly.bsky.social · 4d

The new European Butterfly Red List found that the biggest threats to butterflies continue to be habitat loss and degradation but climate warming is having a devastating effect on sp. in the far north and far south of Europe. 52% (34) of all Red List sp. are now threatened by climate warming.

Hipparchia tamadabae (La Palma Grayling) is threatened by wildfires (Photo: Yeray Monasterio, Zerynthia)

Recent wildfire on Gran Canaria (Photo: Yeray Monasterio, Zerynthia)

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Reposted by Juha Pöyry

Butterfly Conservation Europe @europebutterfly.bsky.social · 5d

The new European Butterfly Red List shows that butterflies are under increasing threat across Europe, with the number of species at risk of extinction up from 37 to 65 (73%) in the last 10 years. See our Press Release www.bc-europe.eu/documents/68...

www.bc-europe.eu

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Reposted by Juha Pöyry

martinswarren.bsky.social @martinswarren.bsky.social · 5d

The new European Butterfly Red List is published today, with worrying findings. Over 1/4 (28%) of Europe’s 442 species are threatened with extinction or are close to being so. The situation is far worse for our 148 endemic species, 40% are now threatened or nearly so www.bc-europe.eu/webpage.php?...

Front cover of the European Butterfly Red List, showing Polyommatus humedasae. The report can be downloaded at https://www.bc-europe.eu/webpage.php?name=red-list-butterflies-2025

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Juha Pöyry @poyryjuha.bsky.social · 14d

Should be lueneburgensis in the UK.

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Juha Pöyry @poyryjuha.bsky.social · 15d

Third consecutive record-warm September in N Finland.

Mika Rantanen @mikarantane.bsky.social · 15d

Breaking: September 2025 was record-warm in Finnish Lapland, for the third time in a row.

Monthly mean temperature in Sodankylä Tähtelä was 11.0 °C, exceeding the previous record of 10.3 °C set in 2024 (which itself had exceeded the previous record of 10.0 °C set in 2023 and 1934).

Time series of September monthly mean temperatures in Sodankylä Tähtelä in 1901–2025.

Reposted by Juha Pöyry

Tagfalter-Monitoring Deutschland @faltermonitoring.bsky.social · 22d

We are happy to share this on a political level very important paper from our team - The Grassland Butterfly Index for Germany. Especially for the last ten years the results show a negativ trend for grassland butterflies in Germany doi.org/10.3897/natu... @pensoft.net @ufz.de #NRR

Development of the German Grassland Butterfly Index 2006-2023, based on German Butterfly Monitoring Scheme data. The annual index values (points) and the smoothed trend with 95% confidence intervals are shown

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Reposted by Juha Pöyry

Rothamsted Research @rothamsted.bsky.social · 24d

📣New Study: Collapse in UK insect populations may be overstated, but local communities are being reshaped by CC & development 🐝🪲🦋🦗🪰🐞@btobirds.bsky.social @uor-research.bsky.social @savebutterflies.bsky.social @ukceh.bsky.social @universityofleeds.bsky.social www.rothamsted.ac.uk/news/insects...

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Juha Pöyry @poyryjuha.bsky.social · Sep 16

This sp. is a climate opportunist that is expanding towards the north. It has also obtained a strong foothold in S Finland in recent years.

Reposted by Juha Pöyry

Prof. Stefan Rahmstorf @rahmstorf.bsky.social · Sep 11

Grundwissen Klima zur Erinnerung: weniger Tempo beim Klimaschutz heißt unerreichbare Klimaziele! Denn ein großer Teil des CO2 bleibt Jahrtausende in der Luft. Die *kumulativen* Emissionen bestimmen Ausmaß der Erderwärmung! Tempo ist entscheidend!

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Reposted by Juha Pöyry

Suomen ympäristökeskus - Finnish Environment Institute (Syke) @syke.fi · Sep 12

Suomen luontotyyppien ja lajien tila heikkenee edelleen. Tämä käy ilmi Suomen raporteista Euroopan komissiolle luonto- ja lintudirektiivien toimeenpanosta.

Kehityssuunnan kääntäminen vaatii lisäpanostuksia luonnonsuojeluun, ennallistamiseen ja seurantatyöhön.

www.sttinfo.fi/tiedote/7143...

Luontotyyppien ja lajien tilan heikkeneminen jatkuu – Suunta voidaan kääntää investoimalla ennallistamiseen | Suomen ympäristökeskus

Suomi raportoi Euroopan komissiolle luonto- ja lintudirektiivien toimeenpanosta. Arvioinnin tulokset (ym.fi) osoittavat lajien ja luontotyyppien heikkenevän kehityksen jatkuvan edelleen. Myös ennallistamisasetuksen toimeenpanoon tarvitaan yhä enemmän panostuksia lajien ja luontotyyppien tilan parantamiseen sekä seurantaan.

www.sttinfo.fi

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Reposted by Juha Pöyry

Richard Fox @richardfoxbc.bsky.social · Sep 3

📣 New research, including @savebutterflies.bsky.social #citizenscience data, shows winners & losers across >1200 insect species in Britain since 1990. Urbanisation identified as major driver of decline for moths, ladybirds & hoverflies www.nature.com/articles/s41... 🌍 🦋🐞🦗🪲🐝

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Reposted by Juha Pöyry

Mika Rantanen @mikarantane.bsky.social · Sep 1

Summer 2025 in Sodankylä, Finland was the coolest summer of the 2020s, but still ~0.5 °C warmer than the most recent 30-year period (1996–2025).

Modern summers in northern Fennoscandia are warmer than those in medieval times: www.nature.com/articles/s41... & www.nature.com/articles/s41...

Jun-Aug mean temperature in Sodankylä, Finland in 1901–2025.

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Juha Pöyry @poyryjuha.bsky.social · Sep 1

Helmi-ohjelma on parantanut luonnon tilaa Suomessa, mutta rahoitusleikkaukset uhkaavat vesittää hyvän kehityksen.

www.syke.fi/fi/tietoa-me...

Helmi-ohjelma on parantanut luonnon tilaa – resurssipula haastaa tavoitteet

Suomen luonnon monimuotoisuuden turvaamiseksi tehtiin Helmi-elinympäristöohjelmassa jälleen merkittäviä toimia koko Suomessa vuonna 2024. Suomen ympäristökeskuksen kokoama ohjelman vuosikatsaus 2024 k...

www.syke.fi

Reposted by Juha Pöyry

Ilmatieteen laitos - Finnish Meteorological Institute @ilmatieteenlaitos.fi · Aug 27

Ilmastonmuutos vaikuttaa vahvasti perhosiin. Ilmaston lämmetessä Suomeen on levinnyt etelästä monia uusia perhoslajeja. Toisaalta pohjoisten metsien, soiden ja tunturien lajeilta uhkaa loppua elintila.

www.ilmatieteenlaitos.fi/artikkeli/3l...

Lämpenevä ilmasto muuttaa perhoslajistoamme - Ilmatieteen laitos

Ilmaston lämmetessä maahamme on levinnyt etelästä monia uusia perhoslajeja. Kasvukauden pidentyessä yhä useampi perhoslaji myös tuottaa kesän aikana enemmän kuin yhden sukupolven. Toisaalta

www.ilmatieteenlaitos.fi

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Reposted by Juha Pöyry

Prof. Stefan Rahmstorf @rahmstorf.bsky.social · Aug 28

I was shocked when I first saw these results from standard climate models used in IPCC reports: for high emissions, the Atlantic overturning circulation #AMOC shuts down in all 9 models that ran past 2100, and is well on the way to shutdown by 2100.
Our paper on that is out today.🧵

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Juha Pöyry @poyryjuha.bsky.social · Aug 22

@mahtabyazdanian.bsky.social defending her PhD thesis "Moth abundance changes and consequent bottom-up effects on birds in boreal forests" today.

Congratulations for a really nice piece of work!

Tuomas Kankaanpää @bugwebs.bsky.social · Aug 22

@mahtabyazdanian.bsky.social defending her thesis on "Moth abundance changes and consequent bottom-up effects on birds in boreal forests". I'm proud to have mentored such a bright new PhD.

Three people, formally dressed in black sitting in a large lecture hall: Anu Valtonen, the opponent on the left, Sami Kivelä as the custos in the middle and Mahtab Yazdanian, the candidate in the speaker booth on the right.

Reposted by Juha Pöyry

UK Centre for Ecology & Hydrology (UKCEH) @ukceh.bsky.social · Aug 21

🦋 New UKCEH research with @naturalengland.bsky.social and @btobirds.bsky.social shows the positive impacts of agri-environment schemes (AES) on butterflies.

Paper: besjournals.onlinelibrary.wiley.com/doi/10.1111/... @jappliedecology.bsky.social

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Positive impacts of agri‐environment schemes on butterflies from multiple evidence sources

Our results provide support for positive effects of AES on butterflies in England from multiple sources of evidence, providing confidence that these schemes are providing tangible benefits for butter...

besjournals.onlinelibrary.wiley.com

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Reposted by Juha Pöyry

Maija Karala @maijakarala.bsky.social · Aug 20

New summer adventures mean new moths! Here are a few I have met, photographed and illustrated this summer.

I’m at around 55 species of the 300 or so geometer moths found in Finland. At least I’m not running out anytime soon.

Digital illustration of a golden brown and yellow patterned geometer moth, Hydrelia flammeolaria.

Digital illustration of a blue-green geometer moth, Jodis putata.

Digital illustration of a black and white patterned geometer moth, Rheumaptera hastata.

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Juha Pöyry @poyryjuha.bsky.social · Aug 18

In 1990s, the species started expanding towards N-NW, and now it occurs commonly up to the Arctic circle. In 2025 the species was photographed on the Jehkats fell situated in the NW tip of Finland, adjacent to Norwegian border. 2/2
(Maps from FinBIF hub, Laji.fi)

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Juha Pöyry @poyryjuha.bsky.social · Aug 18

The Silver-washed fritillary (Argynnis paphia, keisarinviitta) is one of the opportunist butterflies that has benefitted most from the warming climate in N Europe. When I started with butterflies in early 1980s, this species was rare and occurred in a narrow area in SE Finland. 1/2

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Juha Pöyry @poyryjuha.bsky.social · Aug 15

The Sooty copper (Lycaena tityrus, tummakultasiipi) is an expansive species in N Europe that was first found in Finland in 2009, but only in recent years it has gained a stronger foothold along the S coast of the country. The pic shows a female butterfly (Hanko, 14 August 2025).