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Juha Pöyry

@poyryjuha.bsky.social
163 followers 96 following 121 posts

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

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Juha Pöyry @poyryjuha.bsky.social · 24/09/2026
An interesting comparison of pollinator flower visits observed by humans vs. trail cameras. Cameras turned out to be superior. resjournals.onlinelibrary.wiley.com/doi/10.1111/...
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Emy Guilbault @emyguilbault.bsky.social · 17/09/2026
Very happy to share that our paper on climate, habitat & moth communities received one of the 2025 Outstanding Article Awards from the Faculty of Biological and Environmental Sciences at the University of Helsinki! #Biodiversity #GlobalChange 📖 besjournals.onlinelibrary.wiley.com/doi/10.1111/...
besjournals.onlinelibrary.wiley.com
Strong context dependence in the relative importance of climate and habitat on nation‐wide macro‐moth community changes
We present a novel predictive variance partitioning and scenario framework for drivers of species and communities. By addressing data gaps and incorporating climatic conditions, habitat, and species ...
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Butterfly Conservation Europe @europebutterfly.bsky.social · 14/09/2026
We are delighted to be supporting the next Symposium on the Ecology and Conservation of Butterflies and Moths. In Girona, Spain 6-10 April 2027. Early Bird bookings open now. Don’t miss it. esdeveniments.udg.edu/148395/detai...
esdeveniments.udg.edu
Ecology and Conservation of Butterflies & Moths International Symposium
6-10 april 2027 Girona The Ecology and Conservation of Butterflies " />
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Aleksi Lehikoinen @aksulehikoinen.bsky.social · 11/09/2026
Pitkäjänteinen seurantatyö suojelualueilla tuottaa arvokasta tietoa: "Suuret suojelualueet auttavat pohjoisia lintulajeja selviämään ilmastonmuutoksesta". www.helsinki.fi/fi/uutiset/l... @nathist.bsky.social @helsinki.fi @metsahallitus.bsky.social @birdlifesuomi.bsky.social @luontopaneeli.fi
helsinki.fi
Suuret suojelualueet auttavat pohjoisia lintulajeja selviämään ilmastonmuutoksesta | Helsingin yliopisto
Kylmään ilmastoon sopeutuneet lintulajit tarvitsevat pärjätäkseen suuria suojelualueita. Etelä-Suomen pienet ja hajanaiset suojelualueet eivät riitä turvaamaan niiden tulevaisuutta ilmaston lämmetessä...
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Juha Pöyry @poyryjuha.bsky.social · 08/09/2026
Pölyttäjillä on ollut hyvä kesä epävakaisesta säästä huolimatta: yle.fi/a/74-20244359
yle.fi
Iloinen uutinen ympäristöstä: perhosia ja kimalaisia oli kuluneena kesänä erityisen paljon
Pölyttäjistä ei ole tarpeeksi tietoa, jotta pystyttäisiin arvioimaan, millainen lajikato on meneillään.
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Mika Rantanen @mikarantane.bsky.social · 01/09/2026
Happy autumn! Summer 2026 in Finland was very close to the 1991–2020 averages, and even slightly above it. It may feel counterintuitive, but I'd argue it's part of the shifting baseline -syndrome. We just didn't have those week-long heatwaves this year, as opposed to western Europe.
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Emilie Ellis @e-ellis1.bsky.social · 17/08/2026
🦋 I’m recruiting a fully funded PhD student at the University of Helsinki: understanding how butterflies respond to climate change across Europe. Apply by 30 Sept: Full details: jobs.helsinki.fi/job-invite/5... Please share! #ecology #job #phd
jobs.helsinki.fi
Doctoral Researcher (PhD student) in Butterfly Ecology and Climate Change across Europe
Doctoral Researcher (PhD student) in Butterfly Ecology and Climate Change across Europe
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Research Centre For Ecological Change @rececochange.bsky.social · 10/08/2026
Yli 60 % Suomen tunnetuista perhoslajeista on muuttanut levinneisyysaluettaan. Taustalla ilmastonmuutos ja äärimmäiset sääolot. @marjosaastamoinen.bsky.social osallistui yhteistyötutkimukseen, jossa tarkasteltiin perhosten levinneisyyksien muutoksia ympäri maailmaa. www.helsinki.fi/fi/uutiset/l...
helsinki.fi
Lämpenevä ilmasto vaikuttaa perhosten liikkumiseen - Suomessa muutoksia havaittu poikkeuksellisen paljon | Helsingin yliopisto
Suomessa yli 60 prosenttia tunnetuista perhoslajeista on muuttanut levinneisyysaluettaan, osoittaa tuore tutkimus, jossa perhosten liikkumista tarkasteltiin maailmanlaajuisesti.
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The Dark Sky Ambassador @darkskyambassador.bsky.social · 30/07/2026
Amber LED street lights could save millions of insects. New research shows 1800K amber LEDs cut insect attraction by ~40% compared to standard white LEDs, emitting almost no blue light. The study tracked 71,000 bugs across 6 German railway stations. #LightPollution #Insects #Wildlife #DarkSkies
independent.co.uk
Researchers may have solved a problem caused by artificial street lights
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IUCN SSC Butterfly & Moth Specialist Group @iucnbutterflysg.bsky.social · 15/07/2026
📣EUROPEAN RED LIST OF MOTHS PUBLISHED!📣 A m(amm)oth task - huge congratulations to the team! Spoiler: >3000 species assessed at the European level, 704 of them endemic. Ca. 25% are listed as Data Deficient & 11% threatened with extinction. op.europa.eu/en/publicati...
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Dr Manu Saunders FRES @manusaunders.bsky.social · 30/06/2026
A 2019 paper that is often used as evidence of the flawed 'windscreen phenomenon' has been retracted. I cited this paper a few years ago in explainers about why this particular anecdote cannot be used as evidence of insect decline. See thread below 👇 retractionwatch.com/2026/06/23/a...
retractionwatch.com
A prolific evolutionary biologist caught faking data decades ago notches a new retraction
A study claiming a tenfold decrease in bugs splattered on evolutionary biologist Anders Møller’s windshield over two decades has been retracted. shanecotee / iStock Anders Møller, an influential ev…
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Niklas Wahlberg @lepphylo.bsky.social · 22/06/2026
An enigmatic rarely collected South African species and an undescribed mystery species from South America turn out to belong to a new Lepidoptera family in the superfamily Geometroidea! Museomics solves the mystery! doi.org/10.1111/syen...
doi.org
Two Southern Hemisphere species on two continents, one rarely collected, one undescribed, form a moth family without hearing organs (Lepidoptera, Geometroidea, Apoprogonidae stat. rev.)
The systematic placement of the South African Apoprogones hesperistis Hampson and southern South American Ona australis gen. et sp. n. has been controversial. Based on mitogenomes, phylogenomic data...
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Juha Pöyry @poyryjuha.bsky.social · 18/06/2026
Electromagnetic noise disrupts flight orientation in bats: www.science.org/doi/10.1126/...
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Felix Neff @felixneff.bsky.social · 02/06/2026
📄Out now 📄: 90-year trends in Switzerland show declines in butterfly and saproxylic beetle richness around the mid-20th century, linked to agricultural mechanisation. Some groups have recovered in recent decades, especially warm-adapted species. Specialised and cold-adapted species remained low.🦋🪲
A combined figure with figure panels from the publication. One panel (panel a) showing the trends in Switzerland-wide relative richness of butterflies and saproxylic beetles, with clear declines of butterflies until the 1980s and declines followed by increases for the saproxylic beetles. The other panel (panel b) shows trends of relative species richness for the two insect groups divided by different traits. In the upper part of the figure, groups are built based on the habitat specialisation of the species and it is evident in both groups, that habitat specialists declined strongest. In the lower part of the figure, groups are built based on temperature niche of the species and it is evident that while warm-adapted species have declined strongest until the 1980s, they have clearly reversed their trends and are now increasing strongly.A photo of Lycaena virgaureae, a species with specialised food resources that has mostly disappeared from the Swiss lowlands in the last 90 yearsA photo of Aromia moschata, a longhorn beetle that has become rare in the mid 20th century, but which has increased in recent decades
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Suomen Luontopaneeli @luontopaneeli.fi · 04/06/2026
Luontopaneeli esittää seuraavalle hallituskaudelle keinoja luontokadon pysäyttämiseksi ja luonnon kokonaistilan parantamiseksi. Luontotavoitteista kannattaa pitää kiinni – viivytteleminen lisää sekä riskejä että taloudellisia kustannuksia. 👉 luontopaneeli.fi/ajankohtaist...
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Mika Rantanen @mikarantane.bsky.social · 29/05/2026
Based on preliminary estimate, the meteorological spring (Mar-May) will be record-warm in Helsinki Kaisaniemi, Finland's longest running weather station (records kept since 1845). The mean temperature is estimated to be 6.9 °C that will break the long-standing record of 6.6 °C from 1921.
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Mr and Mrs Trellis @thenorfolkcoast.bsky.social · 25/05/2026
Toxic rain... Occurrence of neonicotinoids, sulfoxaflor, and two metabolites in precipitation in Japan www.sciencedirect.com/science/arti...
sciencedirect.com
Occurrence of neonicotinoids, sulfoxaflor, and two metabolites in precipitation in Japan
Neonicotinoids and sulfoxaflor, widely used in Japanese rice cultivation, frequently contaminate aquatic environments due to their high-water solubili…
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Mika Rantanen @mikarantane.bsky.social · 20/05/2026
Ilomantsi Mekrijärvi in easternmost Finland just reached 30.2 °C! First 30C in Finland this year, and the 2nd earliest such temperature ever recorded. The all-time May heat record for Finland is 31.0 °C so not far from that either.
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Patrícia Pečnerová @patriciachrzan.bsky.social · 16/04/2026
Can you believe that until now there were more genomes sequenced for the woolly mammoth than for living African elephants? Today, we bring you the first genomic, continent-scale analyses of 232 high-quality genomes of both species, the savanna and forest elephant. www.nature.com/articles/s41...
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Mika Rantanen @mikarantane.bsky.social · 11/05/2026
Update to the drought situation: year-to-date precipitation total in Finland is again the lowest on record (since 1961). The 2026 precipitation in Finland (~78 mm) is only 54 % of the long-term normal (143 mm) at this time of the year.
Cumulative precipitation in Finland since January 1st 2026.
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martinswarren.bsky.social @martinswarren.bsky.social · 08/05/2026
Happy Birthday Sir David Attenborough. It is a measure of this great man that amongst his many commitments he found time to support a small NGO like @savebutterflies.bsky.social and attend many events. Here opening a reserve in 1999, at the Big Butterfly Count in 2011, and Moths Count launch 2007
Sir David opening Butterfly Conservation's Magdalen Hill Down reserve in 1999 (with the late George York)Sir David at the Big Butterfly Count launch in 2011Sir David showing children a butterfly in 2011Sir David with a Lime Hawk Moth at the Moths Count launch in 2007 (with Martin Warren)
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Maria Heikkilä @mariaheikkila.bsky.social · 06/05/2026
New opening for a postdoctoral researcher in PhenoBees project (Finnish Museum of Natural History) jobs.helsinki.fi/job/Helsinki...
jobs.helsinki.fi
Postdoctoral researcher in insect morphology and evolution
Postdoctoral researcher in insect morphology and evolution
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WWF Suomi @wwf.fi · 27/04/2026
Tuore kyselytutkimuksemme paljastaa, että valtaosa suomalaisista haluaa, että ennallistamisella parannetaan luonnon tilaa vaikuttavasti. wwf.fi/uutiset/2026...
wwf.fi
WWF: Enemmistö suomalaisista kannattaa luonnon ennallistamisen vaikuttavaa toimeenpanoa
WWF:n teettämä kysely paljastaa, että 64 prosenttia suomalaisista toivoo aidosti luonnon tilaa parantavaa ennallistamistyötä, ja näkee sen samalla tuovan lisää työpaikkoja ja mahdollisuuksia…
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Communications Biology @commsbio.nature.com · 22/04/2026
🦋 Long-term citizen science observations can help us understand climate impacts 👉 Using 44 years of #Lepidoptera observations, models suggest that diurnal vs nocturnal species respond differently to warming, highlighting diel activity as a key factor shaping phenology. www.nature.com/articles/s42...
nature.com
Contrasting phenological shifts in diurnal and nocturnal Lepidoptera under climate change - Communications Biology
A novel model of how light requirement, temperature, and photoperiod jointly define phenological time-spaces for diurnal and nocturnal ectotherms, combined with long-term data for Lepidopterans demons...
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Mika Rantanen @mikarantane.bsky.social · 19/04/2026
New open-access study: summer 2024 in the northern extra-tropics was the warmest in 2000 years. The warmest reconstructed summer (246 CE) was 1.5 °C colder than 2024. Helama (2026): link.springer.com/article/10.1...
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Antti Halkka @anttihalkka.bsky.social · 15/04/2026
Thermacellillä ON vaikutuksia kimalaisiin. Eivät löydä kotiin.
suomenluonto.fi
Tutkimus: Thermacellin hyönteismyrkky eksytti kimalaiset – eivät löytäneet pesiään
Myrkylle altistuneista kimalaisista moni ei löytänyt takaisin pesäänsä. Suomalaistutkimus on ensimmäinen, jossa pralletriini-hyönteismyrkyn osoitetaan haittaavan mesipistiäisiä tilanteissa, jotka matk...
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Juha Pöyry @poyryjuha.bsky.social · 14/04/2026
Today I spotted the Scarce Tortoiseshell (isonokkosperhonen, Nymphalis xanthomelas) at a couple of localities in the Helsinki region, S Finland. This is the fifth year in a row that I have seen successfully overwintered individuals of the species here (Helsinki, 14 April, 2026).
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Butterfly Conservation Europe @europebutterfly.bsky.social · 05/04/2026
Ever wanted to know about the special butterflies in the far north of Europe. Here is your chance to learn from an expert, Nils Ryrholm, who will deliver his online masterclass on Wednesday at 1500 CET. We can promise you a fabulous presentation. Details here butterfly-monitoring.net/index.php/ep...
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David N. Thomas @dnthomas01.bsky.social · 05/04/2026
Including vegetation, dead wood, wood products, and soils, primary forests stored over 70% more carbon than secondary forests, a difference several times greater than previous estimates. Open access link: www.science.org/doi/10.1126/...
science.org
Higher carbon storage in primary than secondary boreal forests in Sweden
Boreal forests provide considerable global land carbon storage and uptake, but they are being rapidly transformed to managed secondary forests, with poorly quantified implications for ecosystem carbon...
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Juha Pöyry @poyryjuha.bsky.social · 01/04/2026
A new study finally confirms that Noctuid moths Diachrysia chrysitis and D. stenochrysis are distinct species, BUT they seem to remain inseparable based in outer appearance..
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Butterfly Conservation Europe @europebutterfly.bsky.social · 30/03/2026
Our online meeting today with butterfly monitoring coordinators revealed that most EU Member States still have not decided whether to use the Grassland Butterfly Index, and many are consulting with citizens. Now is your chance to urge them to help pollinators and choose this unique insect indicator
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Mika Rantanen @mikarantane.bsky.social · 27/03/2026
Incredibly warm March after such a cold Jan-Feb. The month will go down in history as the first March in Finland with nationwide mean temperature above freezing (0 °C). Practically all weather stations will set new March mean temperature record, except those located further out in the Baltic Sea.
Monthly mean temperature anomaly in March 2026 in Europe. Figure downloaded from http://www.karstenhaustein.com/climate.
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Chris van Swaay @chrisvanswaay.eurosky.social · 25/03/2026
Addressing Gaps in Butterfly Population Monitoring to Catalyze Global Insect Conservation. This paper calculates a “Global Butterfly Index” using the Living Planet Index approach, paving the way for a global network of butterfly monitoring schemes. conbio.onlinelibrary.wiley.com/doi/10.1111/...
conbio.onlinelibrary.wiley.com
Addressing Gaps in Butterfly Population Monitoring to Catalyze Global Insect Conservation
The conservation community sorely lacks a global indicator of change in insect populations. Given widespread insect declines, addressing this gap is key for conservation and policy targets. We sugges...
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Juha Pöyry @poyryjuha.bsky.social · 20/03/2026
Butterfly season 2026 starts on the spring equinox in S Finland (Sipoo 20.3.2026). Somewhat surprising as January-February period was very cold, but in March spring has progressed fast.
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Juha Pöyry @poyryjuha.bsky.social · 17/03/2026
January-February period was the coldest in 15 years in Finland, but in March spring has progressed fast, and moth monitoring period started last weekend in inner parts of S Finland, including Lammi Biological station.
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Corey Bradshaw @conservbytes.bsky.social · 15/03/2026
My long-time friend and colleague, the legendary Paul Ehrlich, died on Friday at 93 years old. He had a good innings, but I’ll miss him www.nytimes.com/2026/03/15/b...
nytimes.com
Paul R. Ehrlich, Who Alarmed the World With ‘The Population Bomb,’ Dies at 93
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martinswarren.bsky.social @martinswarren.bsky.social · 11/03/2026
Canary Island Large White now in crisis following likely extinction on Tenerife
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Tyson Wepprich @tysonwepprich.bsky.social · 10/03/2026
Phenological shifts and increases in voltinism within a moth community over a century of anthropogenic change - Foster - 2026 - Ecology - Wiley Online Library esajournals.onlinelibrary.wiley.com/doi/full/10....
esajournals.onlinelibrary.wiley.com
Phenological shifts and increases in voltinism within a moth community over a century of anthropogenic change
In temperate ecosystems, warming temperatures can advance spring phenology, extend autumn phenology, disrupt dormancy regulation, result in phenological mismatch across taxa, and even lead to increas...
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Suomen ympäristökeskus - Finnish Environment Institute (Syke) @syke.fi · 10/03/2026
Suomi tarvitsee viipymättä luonnon monimuotoisuusstrategian. Kansallisen luontopaneelin (IPBES) työryhmän jäsenistä koostuva ryhmä esittää luonnon monimuotoisuusstrategian ja sen toimintaohjelman pikaista toimeenpanoa. Tiedote: www.sttinfo.fi/tiedote/7186...
Kuvassa Suomen ympäristökeskuksen pääjohtaja ja hänen sitaatti "Suomi tarvitsee viipumättä vaikuttavan luonnon monimuotoisuusstrategian - ilman sitä talouden perustaa ja kokonaisturvallisuutta heikentävän luontokadon pysäyttämiseen ei ole suuntaa."
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Jens-Christian Svenning @jcsvenning.bsky.social · 04/03/2026
Dense, dark forests in Europe are a modern phenomenon - Europe’s landscapes for 23 Myr were mostly tree- & flower-rich mosaics shaped by large herbivores, not dense #forests, see our new synthesis www.eurekalert.org/news-release... #forests #woodlands #paleoecology #nature #trees #refiorestation
eurekalert.org
Dense, dark forests in Europe are a modern phenomenon
A new, comprehensive study shows that Europe’s landscapes over the past more than 20 million years have predominantly been a mosaic of grasslands, scrub and woodlands of varying density. A light...
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Suomen ympäristökeskus - Finnish Environment Institute (Syke) @syke.fi · 03/03/2026
Haluatko johtaa tutkimusta, joka vauhdittaa kestävyysmurrosta? Suomen ympäristökeskus hakee tieteellistä johtajaa ajalle 1.9.2026–31.8.2031. Tieteellisenä johtajana vastaat Syken tutkimuksen laadusta, vaikuttavuudesta ja eettisyydestä. Hae Valtiolle.fi-palvelussa: valtiolle.fi/fi/tyopaikat...
Nainen osoittaa valkokankaalle esitykseensä. Kaksi ihmistä istuu selät kameraan päin katsoen esitystä, pöydällä kannettavia tietokoneita.
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martinswarren.bsky.social @martinswarren.bsky.social · 03/03/2026
So Moths evolved almost 300 million years ago and butterflies are newcomers at 100 million years. A fascinating look back at evolutionary history
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Mika Rantanen @mikarantane.bsky.social · 02/03/2026
January-February in Finland was the 2nd coldest in this century, only a tad 0.2 °C warmer than the same period in 2010. The average temperature in 2026 was -13.5 °C.
Time series of Jan-Feb temperature in Finland in 1900-2026.
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Juha Pöyry @poyryjuha.bsky.social · 26/02/2026
The new European Red List of bees was published today 1/2 op.europa.eu/en/publicati...
op.europa.eu
European red list of bees - Publications Office of the EU
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Mika Rantanen @mikarantane.bsky.social · 24/02/2026
The Finnish area mean temperature has stayed below normal now for 33 straight days. The weather has remained consistently cold during 2026, except for the brief 5-day period in mid-January.
Daily average temperature in Finland in 2026, based on FMI ClimGrid data. The values have been consistently below normal, except for 5-day period in mid-January.
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Juha Pöyry @poyryjuha.bsky.social · 22/02/2026
An interesting new study on the geometrid moth Earophila badiata shows how a wide distributional gap between two morphologically different populations (SW Archipelago vs. N Karelia) was filled in only ca. 20 years across S Finland: peerj.com/articles/206...
peerj.com
Quantitative image analysis applied to revise the taxonomy of the Palearctic Earophila badiata species group (Lepidoptera: Geometridae: Larentiinae)
The geometrid moth Earophila badiata (Denis & Schiffermüller, 1775), which occurs widely in the Palearctic realm, has rapidly filled a large gap in its range across southern Finland during the past tw...
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James Hansen @drjamesehansen.bsky.social · 06/02/2026
The presumed upcoming El Nino will help cement and quantify global warming acceleration, showing that 2C global warming is likely to be reached in the 2030s, not at midcentury. See Another El Nino Already? mailchi.mp/caa/another-... Also available on Substack: jimehansen.substack.com/p/another-el...
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Mika Rantanen @mikarantane.bsky.social · 19/02/2026
The Gulf of Finland in the Baltic Sea is almost completely frozen over. Some open water areas still remain off the coast of NW-Estonia but they may freeze in the coming days. Last time the Gulf of Finland has frozen over was in winter 2010/2011, 15 years ago!
Ice chart zoomed in over the Gulf of Finland.
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Juha Pöyry @poyryjuha.bsky.social · 18/02/2026
Timely discussion also in the Nordic region as in the last year we have experienced very high temps in summer 2025 and very low temps during the ongoing winter.
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Butterfly Conservation Europe @europebutterfly.bsky.social · 10/02/2026
Don't forget to tune in this Wednesday 11 February at 15:00 CET to hear our first masterclass on identifying European butterflies from a top expert Rudi Verovnik, covering East Continental and Balkan species butterfly-monitoring.net/EPIC-Butterfly
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