Juha Pöyry
@poyryjuha.bsky.social
Biologist (PhD) - interests ecology, entomology, conservation biology, global change
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)
(Maps from FinBIF hub, Laji.fi)
August 18, 2025 at 3:57 PM
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)
(Maps from FinBIF hub, Laji.fi)
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
August 18, 2025 at 3:57 PM
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
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).
August 15, 2025 at 7:15 AM
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).
The Short-tailed blue (Cupido argiades, kannussinisiipi) is having another good year in Finland, and can now be found in good numbers in e.g. clover fields. This newcomer species has clearly benefitted from warming summers.
August 12, 2025 at 8:03 AM
The Short-tailed blue (Cupido argiades, kannussinisiipi) is having another good year in Finland, and can now be found in good numbers in e.g. clover fields. This newcomer species has clearly benefitted from warming summers.
Pallas's fritillary (Argynnis laodice, etelänhopeatäplä) is now on wings along the S coast of Finland. This newcomer has been able to utilize increasing summer temps in the Nordic region (Kirkkonummi, 4 August 2025).
August 4, 2025 at 5:39 PM
Pallas's fritillary (Argynnis laodice, etelänhopeatäplä) is now on wings along the S coast of Finland. This newcomer has been able to utilize increasing summer temps in the Nordic region (Kirkkonummi, 4 August 2025).
I found several larval nests of the Scarce fritillary (Euphydryas maturna, kirjoverkkoperhonen) on the main larval host plant Melampyrum pratense. Unlike in most countries, this species is still common in Finland and it inhabits e.g. edges of clear-cuts (Mikkeli, 29 July 2025).
July 30, 2025 at 7:03 AM
I found several larval nests of the Scarce fritillary (Euphydryas maturna, kirjoverkkoperhonen) on the main larval host plant Melampyrum pratense. Unlike in most countries, this species is still common in Finland and it inhabits e.g. edges of clear-cuts (Mikkeli, 29 July 2025).
The Large Scabious Mining Bee female (Andrena hattorfiana, ruusuruohomaamehiläinen) is collecting pollen for its offspring. This bee is a specialist dependent on the Field Scabious (Knautia arvensis). In Finland it is distributed mainly in SE parts of the country.
July 23, 2025 at 6:31 AM
The Large Scabious Mining Bee female (Andrena hattorfiana, ruusuruohomaamehiläinen) is collecting pollen for its offspring. This bee is a specialist dependent on the Field Scabious (Knautia arvensis). In Finland it is distributed mainly in SE parts of the country.
The Apollo (Parnassius apollo) was on wings at the last inland location in Finland on July 12, 2025. Thanks to the cool & rainy early summer, it was still accompanied by a worn-out female of the Chequered Blue (Scolitantides orion, kalliosinisiipi).
July 12, 2025 at 3:03 PM
The Apollo (Parnassius apollo) was on wings at the last inland location in Finland on July 12, 2025. Thanks to the cool & rainy early summer, it was still accompanied by a worn-out female of the Chequered Blue (Scolitantides orion, kalliosinisiipi).
Picture of summer 2025 in Finland - no need for irrigation.
July 8, 2025 at 3:16 PM
Picture of summer 2025 in Finland - no need for irrigation.
A newly hatched male of the Moorland Clouded Yellow (Colias palaeno, suokeltaperhonen) on Rhododebdron tomentosum (Mäntsälä, S Finland, 1 July, 2025).
July 1, 2025 at 3:09 PM
A newly hatched male of the Moorland Clouded Yellow (Colias palaeno, suokeltaperhonen) on Rhododebdron tomentosum (Mäntsälä, S Finland, 1 July, 2025).
A pair of the Black-veined white (Aporia crataegi, pihlajaperhonen) and the Scarce fritillary (Euphydryas maturna, kirjoverkkoperhonen) on wings in spite of the cool weather in #Sipoonkorpi national park, S Finland (27 June, 2025).
June 27, 2025 at 12:23 PM
A pair of the Black-veined white (Aporia crataegi, pihlajaperhonen) and the Scarce fritillary (Euphydryas maturna, kirjoverkkoperhonen) on wings in spite of the cool weather in #Sipoonkorpi national park, S Finland (27 June, 2025).
Population monitoring of the Clouded apollo (Parnassius mnemosyne, pikkuapollo) in S Finland (14 June, 2025).
June 14, 2025 at 4:04 PM
Population monitoring of the Clouded apollo (Parnassius mnemosyne, pikkuapollo) in S Finland (14 June, 2025).
The Pearl-Bordered Fritillary (Boloria euphrosyne, pursuhopeatäplä) posing on a peat bog (Sipoo, S Finland, 13 June, 2025).
June 13, 2025 at 3:37 PM
The Pearl-Bordered Fritillary (Boloria euphrosyne, pursuhopeatäplä) posing on a peat bog (Sipoo, S Finland, 13 June, 2025).
The Small Dark Yellow Underwing (Coranarta cordigera, herttakangasyökkönen) is a true bog specialist in the south of Finland, whereas in the north it is less selective (Vihti Nuuksio, 6th June, 2025).
June 6, 2025 at 4:34 PM
The Small Dark Yellow Underwing (Coranarta cordigera, herttakangasyökkönen) is a true bog specialist in the south of Finland, whereas in the north it is less selective (Vihti Nuuksio, 6th June, 2025).
The Green-Underside Blue (Glaucopsyche alexis, virnasinisiipi) is now on wings in S Finland. After a long decline, this species is again increasing in abundance and spreading back to areas where it used to occur decades ago.
June 1, 2025 at 7:15 PM
The Green-Underside Blue (Glaucopsyche alexis, virnasinisiipi) is now on wings in S Finland. After a long decline, this species is again increasing in abundance and spreading back to areas where it used to occur decades ago.
Today I spotted a Tau Emperor (Aglia tau, nastakehrääjä) male circling above vegetation - it located a newly hatched female and within seconds mating started.
May 30, 2025 at 12:33 PM
Today I spotted a Tau Emperor (Aglia tau, nastakehrääjä) male circling above vegetation - it located a newly hatched female and within seconds mating started.
Shining colours of a newly hatched Chequered Blue (Scolitantides orion) male. This species inhabits rocky outcrops with Hylotelephium telephium, hostplant of the larva. After grazing in forests ceased in 1960s, habitats have overgrown and the species placed in the threat class EN in Finland.
May 28, 2025 at 6:03 AM
Shining colours of a newly hatched Chequered Blue (Scolitantides orion) male. This species inhabits rocky outcrops with Hylotelephium telephium, hostplant of the larva. After grazing in forests ceased in 1960s, habitats have overgrown and the species placed in the threat class EN in Finland.
The Freija fritillary (Boloria freija, muurainhopeatäplä) is the earliest fritillary on wings in Finland and it inhabits bog habitats. The species has suffered of the large-scale ditching of bogs that started ca. 1960, and it is now classified as near threatened (NT).
May 27, 2025 at 4:42 PM
The Freija fritillary (Boloria freija, muurainhopeatäplä) is the earliest fritillary on wings in Finland and it inhabits bog habitats. The species has suffered of the large-scale ditching of bogs that started ca. 1960, and it is now classified as near threatened (NT).
Flight of the Small Blue (Cupido minimus, pikkusinisiipi) has started in S Finland. This rare species has only two occurrences left in Finland and it is placed in the highest threat class (CR).
May 26, 2025 at 2:26 PM
Flight of the Small Blue (Cupido minimus, pikkusinisiipi) has started in S Finland. This rare species has only two occurrences left in Finland and it is placed in the highest threat class (CR).
Flight period of the Queen of Spain fritillary (Issoria lathonia, helmihopeatäplä) has started in spite of the cool weather in Helsinki region, S Finland.
May 3, 2025 at 1:34 PM
Flight period of the Queen of Spain fritillary (Issoria lathonia, helmihopeatäplä) has started in spite of the cool weather in Helsinki region, S Finland.
Today the most abundant butterfly in surroundings of Helsinki, S Finland was the Scarce tortoiseshell (Nymphalis xanthomelas, isonokkosperhonen). It is hard to believe now that between 1960 and 2000, there were in total only ca. 4 records of this species in Finland.
April 3, 2025 at 2:56 PM
Today the most abundant butterfly in surroundings of Helsinki, S Finland was the Scarce tortoiseshell (Nymphalis xanthomelas, isonokkosperhonen). It is hard to believe now that between 1960 and 2000, there were in total only ca. 4 records of this species in Finland.
Butterfly season was opened in S Finland with the Scarce tortoiseshell (isonokkosperhonen, Nymphalis xanthomelas) (Sipoo, 19 March 2025).
March 19, 2025 at 2:00 PM
Butterfly season was opened in S Finland with the Scarce tortoiseshell (isonokkosperhonen, Nymphalis xanthomelas) (Sipoo, 19 March 2025).
The SW coast of Finland is now snow-free and the first Pale brindled beauties (Phigalia pilosaria, sulkamittari) on wings, so it is time to set the first moth monitoring traps (Kirkkonummi 1.3.2025).
March 1, 2025 at 3:03 PM
The SW coast of Finland is now snow-free and the first Pale brindled beauties (Phigalia pilosaria, sulkamittari) on wings, so it is time to set the first moth monitoring traps (Kirkkonummi 1.3.2025).
Uutta tutkimusta: yöperhosten määrien vaihtelu vaikuttaa hyönteisiä syövien lintujen kantoihin:
www.oulu.fi/fi/uutiset/u...
@mahtabyazdanian.bsky.social @bugwebs.bsky.social
www.oulu.fi/fi/uutiset/u...
@mahtabyazdanian.bsky.social @bugwebs.bsky.social
February 18, 2025 at 8:23 AM
Uutta tutkimusta: yöperhosten määrien vaihtelu vaikuttaa hyönteisiä syövien lintujen kantoihin:
www.oulu.fi/fi/uutiset/u...
@mahtabyazdanian.bsky.social @bugwebs.bsky.social
www.oulu.fi/fi/uutiset/u...
@mahtabyazdanian.bsky.social @bugwebs.bsky.social
February 4, 2025 at 10:35 AM