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Jtciszewski

@jtciszewski.bsky.social

3.3K followers 2.7K following 42 posts

Environmental chemist living & working in Honolulu. All opinions are my own. No DMs.

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Jtciszewski @jtciszewski.bsky.social · 10/06/2026

Rainy morning bicycle ride in East Honolulu today.

A rainbow is visible, in the morning sky, above Hawaii Kai in East Honolulu.

A rainbow is visible, in the morning sky, above Hawaii Kai in East Honolulu.

Jtciszewski @jtciszewski.bsky.social · 23/05/2026

A fake “title card” for “Star Trek: The Next Generation” shows the Enterprise D orbiting a planet, with the episode title from Season 7, Episode 5 of Friends, at the top.

Jtciszewski @jtciszewski.bsky.social · 17/05/2026

Sunday morning bicycle ride, approaching Kohelepelepe (Koko Crater).

A view of Kohelepelepe (Koko Crater) in the distance, green thanks to the wet spring, with the blue Pacific Ocean off the the right and Kalanianaʻole Highway stretching out towards the volcanic tuff cone, with a partly cloudy sky above.

Reposted by Jtciszewski

They Might Be Giants @tmbg.bsky.social · 14/04/2026

Our new album is out today! A sincere request to help spread the word!

Jtciszewski @jtciszewski.bsky.social · 26/12/2025

Mele Kalikimaka!

A large, artificial snowman, standing at the corner of Diamond Head Road & Coconut Ave in Honolulu, Hawaiʻi. The snowman is waving with his right hand and holding a red sign with yellow letters spelling out “Mele Kalikimaka” in his left hand. Standing in front of brightly colored plants, the snowman is wearing a festive top hat and grass skirt.

Jtciszewski @jtciszewski.bsky.social · 16/11/2025

Jtciszewski @jtciszewski.bsky.social · 15/11/2025

Friday night, Waikiki.

Sailboats silhouetted by the setting sun.

Jtciszewski @jtciszewski.bsky.social · 02/09/2025

Kōlea (Pacific Golden Plovers) are back in Hawaiʻi! They breed in Alaska over the summer and return to Hawaiʻi in the fall, usually to the exact same location. They make the non-stop flight from Alaska to Hawaiʻi (4800 km) in 3-4 days.

Jtciszewski @jtciszewski.bsky.social · 21/08/2025

The view from Round Top Drive in Honolulu.

A picturesque view from above Honolulu, with the University of Hawaiʻi at Mānoa (foreground) and Lēʻahi (Diamond Head) and the middle background. The dark blue of the Pacific Ocean is visible under a cloudy sky.

Jtciszewski @jtciszewski.bsky.social · 20/08/2025

I was lucky enough to get some video of a Hawaiian Green Sea Turtle at lunchtime yesterday. I’ve posted longer videos on YouTube. Link in first comment

Jtciszewski @jtciszewski.bsky.social · 16/06/2025

Swimming with the manini (convict tangs) at Hanauma Bay Nature Preserve, Oʻahu. Longer version at youtu.be/b_d26xWU7d8

Jtciszewski @jtciszewski.bsky.social · 02/06/2025

A Hawaiian monk seal napping in the morning sun at Sandy Beach

Jtciszewski @jtciszewski.bsky.social · 25/05/2025

Sunday plumeria

Several white plumeria blossoms on a tree, with green leaves. The five petal flowers have a light pink hue on some petals, and all with yellow centers.

Several yellow plumeria blossoms on a tree, with green leaves. The five petal flowers are white on the edges and all with red centers.

Several multi-colored plumeria blossoms on a tree, with green leaves. The five petals on each flowers have yellow centers, trimmed with pink and white.

Several white plumeria blossoms on a tree, with green leaves. The five petals on these plumeria blossoms have smaller leaves than usual and have yellow centers.

Jtciszewski @jtciszewski.bsky.social · 20/05/2025

Great day to take a nap in the sun, especially if you’re a Hawaiʻian monk seal!

A Hawaiian monk seal naps in the sun at Sandy Beach, O’ahu. The seal is on black rock. The Pacific Ocean is visible in the background and on the right side of the image. Two small, red flags in the foreground delineate the “no entry” zone, to keep the seal safe.

Jtciszewski @jtciszewski.bsky.social · 18/05/2025

Four different views of Koko Crater.

Koko Crater, on the eastern tip of Oʻahu, rises above Sandy Beach. The Pacific
ocean is visible on the left, with the beach and some vegetation in the foreground. The blue sky is partly obscured by white clouds.

Koko Crater, on the eastern tip of Oʻahu, rises above Kalanianaʻole Highway, heading towards Sandy Beach. The cloudy sky is reflected in the Pacific Ocean, on the right side of the photo. There are steep cliffs leading down to the ocean.

Koko Crater is visible in the background of this photograph. The Pacific Ocean fills the foreground, with trees visible in front of Koko Crater. The pale blue sky is partly obscured by clouds.

A photograph of Koko Crater (left) and Koko Head (right) from Waiʻalae Beach Park. The brilliant blue Pacific Ocean is on the right side of the photograph, with the beach stretching to the distance on the right. The sun is partly visible through clouds and tree branches. A few small islands are visible in the ocean.

Jtciszewski @jtciszewski.bsky.social · 28/04/2025

Haleʻiwa Metric Century this morning! Always great to visit the north shore of Oʻahu!

The Waianea mountains from across Kaiaka Bay, early in the morning. The distant mountains appear small. The cloudy sky reflects in the calm, blue water of the bay.

A view of the Pacific Ocean from Hauʻula Beach Park. The blue sky is mostly full of fluffy white clouds. The beach curves to the left of the picture, where a group of palm trees grow tall.

A view of the Pacific Ocean from Kaʻena Point State Park. The blue sky is half-full of fluffy, white clouds. There’s a beach that stretches off to the left side of the photo. In the mid-ground is a field of black lava rocks, shaped like long stairs.

A view of the Pacific Ocean from Kaʻena Point State Park. The blue sky is half-full of fluffy, white clouds, hiding the sun to the upper right side of the photo. There’s a beach that stretches off to the right side of the photo. In the mid-ground is a field of black lava rocks.

Jtciszewski @jtciszewski.bsky.social · 22/04/2025

Paikō Lagoon

A view of Koko Head, on the left side of the picture, beyond Paikō Lagoon, on April 22, 2025. Taken just after low tide, the water level in the lagoon is fairly low. The blue sky is streaked with wispy white clouds.

Jtciszewski @jtciszewski.bsky.social · 20/04/2025

Hālona Beach, Oʻahu

Hālona Beach, a small beach on the eastern side of O’ahu, on Saturday morning, April 19, 2025. The beach is photographed from above (from Kalanianaʻole Highway), the turquoise blue water meeting the beach sand at a small inlet in the rocky cliffs. A few people can be seen on the beach, and in the distance, Makapuʻu Point. The blue sky is partly obscured by white clouds.

Jtciszewski @jtciszewski.bsky.social · 30/03/2025

On the windward side of Oʻahu today.

The Ko’olau Range, in the background, reflected in the Kawainui Canal on a beautiful Saturday day, 29 March 2025. Palm trees on the right side of the photo are also reflected in the still water, along with a few clouds.

Jtciszewski @jtciszewski.bsky.social · 22/11/2024

Lucky enough the spend the day in Kona today!

A photo of Kona, Hawaii. The foreground shows Kailua Bay. The steeple of Mokuaikaua Church stands out against Hualālai, shrouded in clouds.