Marshal Hedin
@mhedin.bsky.social
devoted to the study & understanding of biodiversity, and public sharing of biodiversity knowledge and beauty. a "curator" of biological collections, and of the planet. Dad, Univ Prof
Reposted by Marshal Hedin
Subterranean ecosystems are key to water, climate, biodiversity & culture. But to what extent?
As part of @biodiversa.eu DarCo we demonstrate that they contribute to 75% of classified ecosystem services. Read OA in Biol Rev:
doi.org/10.1002/brv....
Illustration @jmalumbresolarte.bsky.social
As part of @biodiversa.eu DarCo we demonstrate that they contribute to 75% of classified ecosystem services. Read OA in Biol Rev:
doi.org/10.1002/brv....
Illustration @jmalumbresolarte.bsky.social
February 10, 2026 at 2:01 PM
Subterranean ecosystems are key to water, climate, biodiversity & culture. But to what extent?
As part of @biodiversa.eu DarCo we demonstrate that they contribute to 75% of classified ecosystem services. Read OA in Biol Rev:
doi.org/10.1002/brv....
Illustration @jmalumbresolarte.bsky.social
As part of @biodiversa.eu DarCo we demonstrate that they contribute to 75% of classified ecosystem services. Read OA in Biol Rev:
doi.org/10.1002/brv....
Illustration @jmalumbresolarte.bsky.social
Reposted by Marshal Hedin
Medical doctors have no particular expertise on spider bites, and absent the patient bringing in the spider in a jar, and/or a venom test, 99% of "spider bites" are something else.
Medical doctors, in the absense of knowledge, will pass along folklore just to avoid admitting they don't know.
Medical doctors, in the absense of knowledge, will pass along folklore just to avoid admitting they don't know.
February 10, 2026 at 2:23 PM
Medical doctors have no particular expertise on spider bites, and absent the patient bringing in the spider in a jar, and/or a venom test, 99% of "spider bites" are something else.
Medical doctors, in the absense of knowledge, will pass along folklore just to avoid admitting they don't know.
Medical doctors, in the absense of knowledge, will pass along folklore just to avoid admitting they don't know.
Reposted by Marshal Hedin
Interested in the ecosystem services provided by leaf-litter arthropod communities? Read all about it in the latest 'Value in nature' post: 'Hidden treasures'. #biodiversity #nature 🌐
mscaterino.pika.page/posts/hidden...
mscaterino.pika.page/posts/hidden...
Hidden treasures - Leaf litter arthropods and the good that they do - Value in nature
I spend the majority of my research time looking at minute arthropods that live in soil and leaf litter. These species represent a large proportion of biodiversity, hundreds of thousands...
mscaterino.pika.page
February 8, 2026 at 11:30 AM
Interested in the ecosystem services provided by leaf-litter arthropod communities? Read all about it in the latest 'Value in nature' post: 'Hidden treasures'. #biodiversity #nature 🌐
mscaterino.pika.page/posts/hidden...
mscaterino.pika.page/posts/hidden...
i found this little jumper yesterday in east San Diego County, and she has the most wonderful eyelashes!
February 8, 2026 at 7:20 PM
i found this little jumper yesterday in east San Diego County, and she has the most wonderful eyelashes!
Reposted by Marshal Hedin
See you all at Darwin Day next week on our beautiful @sandiegostate.bsky.social campus, featuring Dr. Jim McGuire's keynote lecture on "Darwin, Wallace, and my Own Studies on the Magical Island of Sulawesi, Indonesia"! Deets in the flyer - but please DM me if you have any questions.
February 5, 2026 at 11:03 PM
See you all at Darwin Day next week on our beautiful @sandiegostate.bsky.social campus, featuring Dr. Jim McGuire's keynote lecture on "Darwin, Wallace, and my Own Studies on the Magical Island of Sulawesi, Indonesia"! Deets in the flyer - but please DM me if you have any questions.
Reposted by Marshal Hedin
Skeleton shrimp: superior snackers
This amphipod in the family Caprellidae, has feather-like setae line several of their 18 appendages for collecting food — amphipod translates to “feet on all sides” in Greek.
#argentiniandeepseeps ~1200 meters
This amphipod in the family Caprellidae, has feather-like setae line several of their 18 appendages for collecting food — amphipod translates to “feet on all sides” in Greek.
#argentiniandeepseeps ~1200 meters
February 2, 2026 at 6:01 PM
Skeleton shrimp: superior snackers
This amphipod in the family Caprellidae, has feather-like setae line several of their 18 appendages for collecting food — amphipod translates to “feet on all sides” in Greek.
#argentiniandeepseeps ~1200 meters
This amphipod in the family Caprellidae, has feather-like setae line several of their 18 appendages for collecting food — amphipod translates to “feet on all sides” in Greek.
#argentiniandeepseeps ~1200 meters
Reposted by Marshal Hedin
Interested in insect macrophotography? If you are in the midwest, think about attending this workshop put on by @ageofarthropods.bsky.social and myself, 2-3 May 2026 cvent.me/qK5bOo
February 2, 2026 at 8:32 PM
Interested in insect macrophotography? If you are in the midwest, think about attending this workshop put on by @ageofarthropods.bsky.social and myself, 2-3 May 2026 cvent.me/qK5bOo
Siskiyou County is the best !
Bear Mountain Lookout 2, Siskiyou County, CA
🗺41.3015, -121.7189 🧭236° ⛰5787 ft
https://ops.alertcalifornia.org/cam-console/17912
🗺41.3015, -121.7189 🧭236° ⛰5787 ft
https://ops.alertcalifornia.org/cam-console/17912
February 2, 2026 at 7:35 PM
Siskiyou County is the best !
Reposted by Marshal Hedin
Given that at least 50% of all biodiversity is unknown to science , the answer is obviously yes!
TLDR; it is too early to stop doing taxonomic & natural history work and exclusively do meta-analysis; our existing datasets are highly structured & biology is weird. we shouldn't assume we already know enough to extrapolate a species' needs for conservation- we still need taxonomy & autecology
February 1, 2026 at 5:12 PM
Given that at least 50% of all biodiversity is unknown to science , the answer is obviously yes!
Reposted by Marshal Hedin
From a group of 14 bighorn rams who were roaming around Borrego Palm Canon on 2026-01-18 (Photos: Sicco Rood). (3)
February 1, 2026 at 12:32 AM
From a group of 14 bighorn rams who were roaming around Borrego Palm Canon on 2026-01-18 (Photos: Sicco Rood). (3)
Reposted by Marshal Hedin
Chromosome-scale #genomes from newly sequenced spiders & the whip scorpion, the genetic basis of spinneret emergence in spiders & the complex history & functional importance of arachnid genome #evolution www.science.org/doi/10.1126/... #biodiversity #genomics
An ancient genome duplication event drives the development and evolution of spinnerets in spiders
A genome duplication event during the Silurian played a crucial role in the evolutionary emergence of spinnerets in spiders.
www.science.org
January 30, 2026 at 11:10 AM
Chromosome-scale #genomes from newly sequenced spiders & the whip scorpion, the genetic basis of spinneret emergence in spiders & the complex history & functional importance of arachnid genome #evolution www.science.org/doi/10.1126/... #biodiversity #genomics
Reposted by Marshal Hedin
Versatile fairy shrimp have gone back into dried mud at Clark Dry Lake. They are best known for producing incredibly hardy, drought-resistant eggs (cysts) that can survive for decades in dry mud, extreme temperatures (-310F to 210F), and even outer space (Photos: Sicco Rood).
January 29, 2026 at 11:14 PM
Versatile fairy shrimp have gone back into dried mud at Clark Dry Lake. They are best known for producing incredibly hardy, drought-resistant eggs (cysts) that can survive for decades in dry mud, extreme temperatures (-310F to 210F), and even outer space (Photos: Sicco Rood).
Reposted by Marshal Hedin
🕸️ The #silk of this gorgeous little cribellator is not your standard silk - read @evoimec.bsky.social new study here: doi.org/10.1073/pnas... 🕸️
January 27, 2026 at 6:10 PM
🕸️ The #silk of this gorgeous little cribellator is not your standard silk - read @evoimec.bsky.social new study here: doi.org/10.1073/pnas... 🕸️
College students over the past 5 years have been traumatized,
and yet, they proceed and continue to inspire me
and yet, they proceed and continue to inspire me
Feels like society’s really broken down in the US in a way that’s deeply traumatic.
But also there are college students knocking on doors asking for shovels (they’re not well-prepared) and helping trapped motorists by shoveling and pushing out cars. Up to 24 of them now, wandering streets together
But also there are college students knocking on doors asking for shovels (they’re not well-prepared) and helping trapped motorists by shoveling and pushing out cars. Up to 24 of them now, wandering streets together
January 26, 2026 at 12:41 AM
College students over the past 5 years have been traumatized,
and yet, they proceed and continue to inspire me
and yet, they proceed and continue to inspire me
Reposted by Marshal Hedin
ICE has kidnapped another Indigenous person in Minneapolis. This is the fifth member of the Očhéthi Šakówinnto be taken this month.
Statement from Standing Rock:
Statement from Standing Rock:
January 25, 2026 at 9:03 PM
ICE has kidnapped another Indigenous person in Minneapolis. This is the fifth member of the Očhéthi Šakówinnto be taken this month.
Statement from Standing Rock:
Statement from Standing Rock:
Reposted by Marshal Hedin
There's something happening here
What it is ain't exactly clear
There's a man with a gun over there
A-telling me I got to beware
I think it's time we stop
Children, what's that sound?
Everybody look what's going down
What it is ain't exactly clear
There's a man with a gun over there
A-telling me I got to beware
I think it's time we stop
Children, what's that sound?
Everybody look what's going down
January 24, 2026 at 5:31 PM
There's something happening here
What it is ain't exactly clear
There's a man with a gun over there
A-telling me I got to beware
I think it's time we stop
Children, what's that sound?
Everybody look what's going down
What it is ain't exactly clear
There's a man with a gun over there
A-telling me I got to beware
I think it's time we stop
Children, what's that sound?
Everybody look what's going down
Reposted by Marshal Hedin
The hazards of failing first-year biology: you invade the wrong pole.
🇦🇶 🐧 🇬🇱 🐻❄️
🇦🇶 🐧 🇬🇱 🐻❄️
January 24, 2026 at 4:34 AM
The hazards of failing first-year biology: you invade the wrong pole.
🇦🇶 🐧 🇬🇱 🐻❄️
🇦🇶 🐧 🇬🇱 🐻❄️
Reposted by Marshal Hedin
Tom and John Emmel and Sterling Mattoon officially began their work on “The Butterflies of California” book in 1974.
Now, more than 50 years after they began, the book draft has officially been published online and is freely available to the public:
www.floridamuseum.ufl.edu/science/the-...
🦋📕
Now, more than 50 years after they began, the book draft has officially been published online and is freely available to the public:
www.floridamuseum.ufl.edu/science/the-...
🦋📕
January 20, 2026 at 9:48 PM
Tom and John Emmel and Sterling Mattoon officially began their work on “The Butterflies of California” book in 1974.
Now, more than 50 years after they began, the book draft has officially been published online and is freely available to the public:
www.floridamuseum.ufl.edu/science/the-...
🦋📕
Now, more than 50 years after they began, the book draft has officially been published online and is freely available to the public:
www.floridamuseum.ufl.edu/science/the-...
🦋📕
Reposted by Marshal Hedin
🧵 1/4 Want to help immigrants in Minnesota? Here are four ways that come highly recommended (three orgs, and one Amazon wishlist by a group of medics)
monarcamn.org/about
monarcamn.org/about
About — Monarca
monarcamn.org
January 20, 2026 at 5:53 PM
🧵 1/4 Want to help immigrants in Minnesota? Here are four ways that come highly recommended (three orgs, and one Amazon wishlist by a group of medics)
monarcamn.org/about
monarcamn.org/about
Reposted by Marshal Hedin
This is so grim. Science isn’t just something nerds do, but the foundation of the modern world. What the Trump regime has done to US science will harm Americans for generations.
‘Shattered’: US scientists speak out about how Trump policies disrupted their careers
Researchers lay bare the human toll of lay-offs, funding cuts and attacks on science one year after the president’s return to the White House.
www.nature.com
January 20, 2026 at 11:23 AM
This is so grim. Science isn’t just something nerds do, but the foundation of the modern world. What the Trump regime has done to US science will harm Americans for generations.
Reposted by Marshal Hedin
Greenlandic politician Tillie Martinussen on the sovereignty of Greenlanders, the greed in the US, and how they view their land. Also comments on how the US treated Natives, as a very good reason to not want to be a part of the US.
youtu.be/xs53IESxz80?...
youtu.be/xs53IESxz80?...
‘Big Miscalculation’: Greenlandic Politician Warns Trump Over Bid to Take Arctic Island | APT
YouTube video by APT
youtu.be
January 20, 2026 at 11:45 AM
Greenlandic politician Tillie Martinussen on the sovereignty of Greenlanders, the greed in the US, and how they view their land. Also comments on how the US treated Natives, as a very good reason to not want to be a part of the US.
youtu.be/xs53IESxz80?...
youtu.be/xs53IESxz80?...
Reposted by Marshal Hedin
January 19, 2026 at 6:41 AM
Scenes from the Mojave
January 19, 2026 at 3:12 PM
Scenes from the Mojave
Reposted by Marshal Hedin
Incoming Red-tailed Hawk (she flew right over my head.)
January 18, 2026 at 9:53 PM
Incoming Red-tailed Hawk (she flew right over my head.)