Brian Gratwicke
@briangratwicke.bsky.social
Conservation biologist @Smithsonian herpetology, amphibian, disease, environment, native plants, wildlife, photography, science, nature, earth optimism.
Caecilians are the legless amphibians, they are rarely seen due to their fossorial habits, so moments like these are very special. This yellow headed caecilian was found in Gamboa Panama behind @amphibianrescue #amphibianresilience
September 11, 2025 at 1:09 PM
Caecilians are the legless amphibians, they are rarely seen due to their fossorial habits, so moments like these are very special. This yellow headed caecilian was found in Gamboa Panama behind @amphibianrescue #amphibianresilience
Got to see my first Sylvia’s tree frog last night #cruziohyla what a spectacular frog! ❤️❤️❤️🐸🇵🇦
September 9, 2025 at 10:39 AM
Got to see my first Sylvia’s tree frog last night #cruziohyla what a spectacular frog! ❤️❤️❤️🐸🇵🇦
Biologist Jorge Guerrel found one of our baby Agalychnis lemur from our frog release trials! #amphibianresilience #anfibioresilente
August 25, 2025 at 12:19 PM
Biologist Jorge Guerrel found one of our baby Agalychnis lemur from our frog release trials! #amphibianresilience #anfibioresilente
Our awesome #teamturtle is featured on Sidedoor podcast - tune in! www.si.edu/sidedoor/she...
July 11, 2025 at 10:56 AM
Our awesome #teamturtle is featured on Sidedoor podcast - tune in! www.si.edu/sidedoor/she...
Look at this monster and it’s still a baby!!!
June 24, 2025 at 1:07 PM
Look at this monster and it’s still a baby!!!
Super rewarding week for me professionally as I was honored to accompany this team of incredible amphibian conservation professionals to release some frogs.
June 20, 2025 at 1:06 PM
Super rewarding week for me professionally as I was honored to accompany this team of incredible amphibian conservation professionals to release some frogs.
Lovely yellow- flecked glass frog couple that I met last night in the jungle
June 18, 2025 at 12:00 PM
Lovely yellow- flecked glass frog couple that I met last night in the jungle
Happy #Biodiversityday enjoy some cool Panamanian amphibians
May 22, 2025 at 10:11 AM
Happy #Biodiversityday enjoy some cool Panamanian amphibians
@amphibianrescue intern Nate Weisenbeck working on some artificial tree holes for our upcoming frog release trials.
May 2, 2025 at 10:36 AM
@amphibianrescue intern Nate Weisenbeck working on some artificial tree holes for our upcoming frog release trials.
Sound on - American toads leking around a vernal pool 🐸🐸🐸
March 30, 2025 at 8:55 PM
Sound on - American toads leking around a vernal pool 🐸🐸🐸
Four-toed salamander was a bonus found on the road after the rains last week. Cool rare salamander.
March 16, 2025 at 10:45 PM
Four-toed salamander was a bonus found on the road after the rains last week. Cool rare salamander.
"I owned my farm for two years before learning that the sky dance is to be seen over my woods every evening in April and May….The show begins on the first warm evening in April at exactly 6:50 p.m... Do not be late, and sit quietly, lest he fly away in a huff." Aldo Leopold A Sand County Almanac
March 15, 2025 at 10:40 AM
"I owned my farm for two years before learning that the sky dance is to be seen over my woods every evening in April and May….The show begins on the first warm evening in April at exactly 6:50 p.m... Do not be late, and sit quietly, lest he fly away in a huff." Aldo Leopold A Sand County Almanac
It’s vernal pool time!
March 8, 2025 at 1:36 PM
It’s vernal pool time!
These pugnosed tree frogs Smilisca sila are tough to photograph in a natural pose that reveals their sky blue thigh and groin area. Cool creatures from my last Panama visit.
March 5, 2025 at 12:17 PM
These pugnosed tree frogs Smilisca sila are tough to photograph in a natural pose that reveals their sky blue thigh and groin area. Cool creatures from my last Panama visit.
Something to brighten your day 😎
February 9, 2025 at 12:40 PM
Something to brighten your day 😎
After 15 years in this pod it’s time for a refurbishment- we are completely re-designing this space with the goal of turning it into an exhibition pod where we can show visitors our frog conservation work up close! Stay tuned!
February 8, 2025 at 11:53 AM
After 15 years in this pod it’s time for a refurbishment- we are completely re-designing this space with the goal of turning it into an exhibition pod where we can show visitors our frog conservation work up close! Stay tuned!
Some neat creatures from a walk around Gamboa, Panama the other night.
February 6, 2025 at 3:41 PM
Some neat creatures from a walk around Gamboa, Panama the other night.
Camera trap pics winter scenes
January 19, 2025 at 10:13 PM
Camera trap pics winter scenes
This was one of the most impactful moments in my life from 12 years ago. Encountering a Tristan thrush on inaccessible island, one of the remotest islands in the world. They had no fear of humans as they navigated oceanic trash piles washed up on their beach.
January 18, 2025 at 12:58 PM
This was one of the most impactful moments in my life from 12 years ago. Encountering a Tristan thrush on inaccessible island, one of the remotest islands in the world. They had no fear of humans as they navigated oceanic trash piles washed up on their beach.
Finishing up the year with a red back salamander cake-we study these little guys with our Smithsonian-Mason school of conservation students using elastomer mark- recapture. You can see a yellow elastomer placement in this recaptured guy #SPARCNET
December 16, 2024 at 12:20 PM
Finishing up the year with a red back salamander cake-we study these little guys with our Smithsonian-Mason school of conservation students using elastomer mark- recapture. You can see a yellow elastomer placement in this recaptured guy #SPARCNET
Cute little bold jumping spider
December 9, 2024 at 11:49 AM
Cute little bold jumping spider
Here is an awesome spotted turtle that is radio tracked by our turtle team to understand how these pretty little guys are persisting in agricultural landscapes in Virginia. Draining and tiling of fields has eliminated most of the habitat that they rely on.
November 28, 2024 at 11:53 AM
Here is an awesome spotted turtle that is radio tracked by our turtle team to understand how these pretty little guys are persisting in agricultural landscapes in Virginia. Draining and tiling of fields has eliminated most of the habitat that they rely on.
After the last 2 drought years I decided it was necessary to line some of my more productive vernal pools, here is hoping for a bumper crop of amphibians next spring!
November 22, 2024 at 10:11 PM
After the last 2 drought years I decided it was necessary to line some of my more productive vernal pools, here is hoping for a bumper crop of amphibians next spring!
🐸 all you recent Twitter refugees! 😎
November 17, 2024 at 1:23 PM
🐸 all you recent Twitter refugees! 😎
Love ducking out with Smithsonian Mason School of Conservation students to show them an endangered species they’ve been assigned to research in class.
November 1, 2024 at 10:04 PM
Love ducking out with Smithsonian Mason School of Conservation students to show them an endangered species they’ve been assigned to research in class.