Great Tits Were Paler in Built-Up Neighbourhoods
Across six European cities, great tits had less vivid yellow breasts where buildings and roads covered more of…
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Research, conservation and new discoveries
A continuing selection of new studies, conservation projects and important developments connected to species in the archive.
Western Finland’s Short-eared Owl Breeding Population Fell More Than 50% as Grassy Habitat Shrunk 46%
Over 47 years in western Finland, the local Short-eared Owl breeding population fell by more than 50% while…
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Decades of Reindeer Exclusion Raised Lichen Biomass 4.5-fold and Changed Soil Carbon
Long-term reindeer exclosures in three northern Finnish pine forests had 4.5 times more lichen biomass, moister and cooler…
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Finland’s Tufted Duck Breeding-Pair Index Has Fallen 78% Since 1986
Finland’s 2026 tufted duck breeding-pair index was 49% below the long-term average and 15% below 2025, extending a…
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Finland Recorded Its First African Swine Fever Cases in Wild Boar
Finland detected African swine fever for the first time in late July 2026. The Finnish Food Authority’s current…
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Vector-Borne Pathogen DNA Detected in 10 of 23 Finnish Moose Calves
PCR detected Trypanosoma, Anaplasma phagocytophilum or Bartonella DNA in 10 of 23 Finnish moose calves. The small regional…
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Mean Eurasian Blue Tit Winter Count Rose Fourfold in Finnish Urban Survey Plots
Across 31 Finnish settlements, mean Eurasian blue tit counts rose from 2.8 birds per standardised urban plot in…
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Female Common Eiders in the High-predation Colony Had Higher Baseline Corticosterone and T3
In two Finnish common-eider colonies, females under high eagle predation had higher baseline corticosterone and T3, while females…
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Northern Hawk Owl Observations Fell to a Tiira-era Low in Finland in Spring 2026
BirdLife Finland’s Tiira review recorded fewer northern hawk owl observations in spring 2026 than in any previous spring…
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Latitude Shaped Redshank Arrival While Breeding Outcome Shaped Departure Across Europe
GPS tracking of 85 adult common redshanks across European breeding landscapes found spring arrival about two days later…
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East Greenland Barnacle Geese Fell to 65,516 While the Russian Flyway Held Near 1.5 Million
AEWA’s 2026 assessment estimated 65,516 East Greenland barnacle geese in March 2026, down from earlier peaks of 80,000,…
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North-west European Greylag Goose Winter Population Estimated at 802,320
The north-west European greylag goose population was estimated at 802,320 wintering birds in January 2025, well above the…
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Nine PFAS Compounds Were Detected in Most Finnish Common Goldeneye Egg Samples
A 2026 Finnish master’s thesis found nine of 19 targeted PFAS compounds in more than 60% of analysed…
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Reed Warblers Long Separated From Cuckoos Showed Weaker Host Defences
Field experiments in Finland and Sicily found weak anti-cuckoo defences in common reed warblers living outside regular cuckoo…
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Lead and Mercury Declined in Finnish Osprey Eggs From 1972–2005
Archived unhatched eggs from 1972–2005 reveal a steep decline in lead and smaller declines in mercury, while a…
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Higher PFOS Was Linked to Lower Egg Temperatures in Finnish Common Eiders
Researchers studied 18 female common goldeneyes and 37 female common eiders in Finland. Higher PFOS was linked to…
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Pine Mires Stood Out as Early-Spring Habitat for Willow Tits in Managed Finnish Forests
Passive acoustic monitoring at 285 forest sites in southwestern Finland found willow tits consistently associated with pine mires…
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Willow Tit’s Three Major Genomic Lineages Closely Matched Its Main Song Types
Whole-genome data from 88 willow tits representing all 14 subspecies revealed three major Palearctic genomic lineages whose broad…
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Under High Predation Risk, Large-Headed Eider Females Bred Later Than Small-Headed Females
A 2026 Finnish study of 1,461 eider breeding attempts found that high predation risk widened differences in laying…
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Hunting Dogs Increased Recorded Moose Unevenly Across Classes in Finland
Analysis of about half a million Finnish hunter observations found that dog use altered detection unevenly among moose…
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