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jtciszewski.bsky.social
Jtciszewski
@jtciszewski.bsky.social
2.4K followers 2.5K following 26 posts
Environmental chemist living & working in Honolulu. All opinions are my own. No DMs.
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jtciszewski.bsky.social
November 16, 2025 at 9:03 PM
jtciszewski.bsky.social
Friday night, Waikiki.
Sailboats silhouetted by the setting sun.
November 15, 2025 at 4:32 AM
jtciszewski.bsky.social
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.
September 2, 2025 at 4:07 AM
jtciszewski.bsky.social
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.
August 21, 2025 at 8:18 PM
jtciszewski.bsky.social
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
August 20, 2025 at 12:19 AM
jtciszewski.bsky.social
Swimming with the manini (convict tangs) at Hanauma Bay Nature Preserve, Oʻahu. Longer version at
youtu.be/b_d26xWU7d8
June 16, 2025 at 8:39 PM
jtciszewski.bsky.social
A Hawaiian monk seal napping in the morning sun at Sandy Beach
June 2, 2025 at 12:11 AM
jtciszewski.bsky.social
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.
May 25, 2025 at 10:13 PM
jtciszewski.bsky.social
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.
May 20, 2025 at 12:04 AM
jtciszewski.bsky.social
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.
May 18, 2025 at 10:07 PM
jtciszewski.bsky.social
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.
April 28, 2025 at 1:54 AM
jtciszewski.bsky.social
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.
April 22, 2025 at 9:46 PM
jtciszewski.bsky.social
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.
April 20, 2025 at 12:11 AM
jtciszewski.bsky.social
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.
March 30, 2025 at 3:25 AM
jtciszewski.bsky.social
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.
November 22, 2024 at 3:01 AM