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Fledgling seabirds in Hawaii are easy prey for tiger sharks

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Fledgling seabirds in Hawaii are easy prey for tiger sharks


A tiger shark lunges out of the water to grab a young albatross. A new study has revealed that fledgling seabirds attract tiger sharks during the summer at Hawaii’s French Frigate Shoals. Image via Joe Spring/ NOAA/ University of Hawaii Manoa.

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  • Tiger sharks gather around Hawaii’s French Frigate Shoals in summer to prey on newly fledged seabirds, a new study has revealed.
  • The influx of tiger sharks pushes smaller shark species to change where and how they hunt.
  • Seasonal seabird movements strongly influence the balance of the entire local shark ecosystem.

When seabirds fledge, northwestern Hawaii shark ecosystems are disrupted

There are several shark species that patrol the waters of the French Frigate Shoals atoll in northwestern Hawaii. In December 2025, scientists reported that the population of tiger sharks surges during the summer in some areas of the atoll. That’s because those sharks are opportunistically preying on newly fledged seabirds, primarily albatross chicks. Moreover, that high seasonal influx of tiger sharks forces smaller sharks in those waters to change the way they use their habitat.

Chloé Blandino, at the Hawaii Institute of Marine Biology Shark Lab, is the lead author of the paper on this study. She said in a statement:

We discovered that tiger sharks gather around small islands in summer to hunt fledgling seabirds, which, in turn, forces other smaller sharks to adjust their habitat use. It’s a clear example of how a seasonal food source can influence habitat use by an entire predator community.

The researchers published their findings in the peer-reviewed journal Ecosphere on December 2, 2025.

Tiger sharks go after young seabirds

The French Frigate Shoals in northwestern Hawaii is a crescent-shaped barrier reef with small sandy islands. These tiny islands provide critical habitat for seabirds, green sea turtles, and Hawaiian monk seals. The seabirds include species like albatrosses, tropicbirds and terns.

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Blue ocean with a crescent-shaped atoll and some clouds.
This image of the French Frigate Shoals in the northwestern Hawaiian Islands was captured by an astronaut in 2003. It shows the crescent shaped reef hugging a lagoon with small sandy islands. Image via NASA.

During the summer, tiger sharks converge in the atoll waters to prey on fledgling seabirds. These young birds, which hatched just months earlier, are just learning to fly. As a result, they have not yet become adept at avoiding predators.

Tracking shark behavior

The researchers targeted three species known to frequent the atoll waters: tiger sharks (Galeocerdo cuvier), Galapagos sharks (Carcharhinus galapagensis), and gray reef sharks (Carcharhinus amblyrhynchos).

They surgically inserted acoustic transmitters in the sharks, each one emitting a unique coded signal. Their work followed careful animal handling protocols that University of Hawaii researchers developed to minimize harm to the sharks.

In addition, the researchers installed underwater receivers to pick up sounds from each shark’s transmitter. These receivers were placed in habitats occupied by the sharks: near coral reefs, as well as in deep and shallow lagoon areas. As a result, when a shark swam near a receiver, the signal from its transmitter was picked up, recording a timestamped location for the animal. This allowed the scientists to track each shark’s movement.

Blue ocean with a crescent-shaped atoll. It is marked with blue, yellow, and red dots within circles and oblongs of dotted lines.
Another image of the French Frigate Shoals, marked with the locations of acoustic receivers. Yellow dots indicate the locations of receivers in the shallow lagoon area and near small sandy islands. Blue dots are for receivers at the deep parts of the lagoon. And red dots are receivers near the coral reef. The dotted boundaries are data analysis regions used by the scientists. Image via Blandino, C. A., et al./ Ecosphere (CC BY 4.0)

Extra influx of tiger sharks affects other sharks

For two years, the scientists tracked 128 sharks at the French Frigate Shoals. Their data revealed interesting information about the sharks’ movements.

They found that tiger sharks are more abundant in the shallow lagoon of the atoll in summer, around the time that albatross chicks are fledging. They were taking advantage of easy prey since the chicks were not yet adept fliers.

Moreover, the summer influx of tiger sharks also affected the dynamics of the atoll’s shark community. Grey reef sharks, which are smaller than tiger sharks, moved out of the lagoon areas occupied by tiger sharks. They retreated to waters near the reef to primarily hunt fish. Meanwhile, Galapagos sharks changed the timing of their hunts in some places. They also preyed on monk seal pups, avoiding albatross chicks.

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Towards the end of summer, surviving fledgling seabirds, along with their parents, dispersed farther out to sea. With no more easy prey to take down, most tiger sharks moved out of the shallow lagoon, and the other sharks returned to their usual ecological niches.

Seabirds have a big impact on shark population

Carl Meyer, also at the Hawaii Institute of Marine Biology Shark Lab, is a paper co-author. He and his colleagues noted that if the birds lost their habitat to adverse weather, it would have a significant effect on the shark community, the Hawaiian monk seals, and of course, the seabirds themselves.

Two seals on a beach looking at two sharks in shallow water.
Two Hawaiian monk seal pups watching two Galapagos sharks swimming in shallow water at Trig Island in the French Frigate Shoals. Image via Carl Meyer/ University of Hawaii Manoa.

Meyer commented:

This study highlights the far-reaching impact of seabirds, showing they can shape the movements of top predators like tiger sharks, which then ripple through the entire food web. Understanding these predator-prey links is crucial for managing Hawaii’s marine ecosystems.

Bottom line: When seabirds fledge at the French Frigate Shoals atoll of northwestern Hawaii, tiger sharks move in to prey on the fledgling seabirds, disrupting shark populations in the area.

Source: Seabirds mediate intraguild and competitive interactions in a shark community

Via University of Hawaii Manoa

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Read more: Teenage Greenland sharks’ hangout spot revealed in new study

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Kolekole Pass cleared for emergency evacuations out of West Oahu

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Kolekole Pass cleared for emergency evacuations out of West Oahu


HONOLULU (HawaiiNewsNow) – The Kolekole Pass is officially allowed to be used as an evacuation route in the event of an emergency on West Oahu.

U.S. military and civilian officials signed an updated official memorandum of understanding Wednesday, opening Kolekole Pass for emergency use.

The first document was signed just prior to July 29, 2025, when Hawaii faced a tsunami warning, and the pass was opened for West Oahu residents to evacuate.

Nearly 500 vehicles made their way through the pass that day as many evacuated the Leeward Coast, officials said.

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Maj. Gen. James Batholomees, U.S. Army Commander, Hawaii, was joined by his counterparts from Joint Base Pearl Harbor-Hickam and the state Department of Transportation officers for Wednesday’s signing.

Batholomees said he took command the day before the tsunami warning.

“The next day, the first order that I had the blessing of giving was in conjunction with the Navy opening the pass during the tsunami,” he said.

Kupuna from the Leeward Coast also attended the signing, saying they were happy for a much-needed secondary route in the event that Farrington Highway is shut down.

Leeward Coast resident William Aila recalled when Farrington Highway was closed for 11 days due to Hurricane Iwa in 1982.

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“We need an opportunity to bring in first aid, to bring in food, and to bring in other emergency supplies,” said Aila.

Officials say they are committed to conducting a mass evacuation rehearsal using Kolekole Pass every year.

Ed Sniffen, director of the state Department of Transportation, said it’s the key to a successful activation to use the route.

“The road is safe,” said Sniffen. “When we rode through this, and we did this twice with large operations, the road is safe.”

He added, “That being said, there are improvements that we still want to make.”

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HDOT continues to work with the U.S. Army and U.S. Navy on upgrading the roadway, which may total $20 million in improvements.



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The Places Visitors Love Most In Hawaii Just Hit Their Limit

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The Places Visitors Love Most In Hawaii Just Hit Their Limit


If you’ve driven Hana Highway recently, as we have, tried to wedge your rental car onto the shoulder at Honolua Bay, inched along North Shore behind an hours-long nonstop line of brake lights, or followed a social media pin taking you to Hoopii Falls, Hawaii just put those exact places into specific future plans.

The state updated plans naming specific beaches, roads, trails, and bays where visitor pressure is highest and outlining what officials say could change at each. The first round of these (DMAPs) leaned heavily on broader goals and community meetings. The latest version, however, now lists the individual sites and attaches proposed actions. These are among the most in-demand places people build into their trips, not some policy abstractions.

Before assuming your next trip will look dramatically different, one basic reality is worth noting. The Hawaii Tourism Authority does not manage the roads, trails, bays, or neighborhoods in question, so the counties, DLNR, Hawaiian Home Lands, and private landowners will be needed to carry out most of what has just been described. In almost every case, the first year at least is focused on more studies, coordination, and setting up of what might come next.

Scenic Point from Road to Hana

Maui: Hana and Honolua finally get specific plans.

Maui’s plan centers squarely on the iconic Hana Highway, with six of the island’s nine site-specific actions targeting that single corridor.

The ideas are relatively straightforward. Paid community stewards at high-traffic stops such as Keanae Peninsula, a first-of-its-kind Hawaii tour guide certification program requiring culturally accurate mo’olelo (storytelling), safety guidance, and place-based knowledge instead of loosely scripted commentary, together with clearer signage identifying safe and legal pullouts while reminding drivers to let residents pass instead of backing up traffic for visitor photo opportunities.

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At Bamboo Forest off Hana Highway, the plan addresses repeated trespassing onto private land. There have been 35 rescues there over the past decade, most requiring use of emergency helicopters. The proposal calls for signage clearly indicating no access. But because that land is privately owned, any real restriction there depends on the owner’s full cooperation.

Honolua Bay carries perhaps the boldest concept of all in the statewide package of suggested changes, including a reservation and shuttle system to eliminate illegal roadside parking, a cultural trail staffed by stewards before visitors ever reach the water, and water stewards who will be paddling out to orient snorkel boat passengers. No procurement process has started, and no shuttle contract exists, so the idea remains on paper for now. Kaupo, where a recently paved road has attracted more traffic and complaints, would also get sensor-linked warning signs at blind hills to focus on driving safety.

Big Island: Kealakekua Bay may see closings.

Kealakekua Bay is the main headline site here, as might be expected. The draft introduces the possibility of “rest days” during coral spawning or other sensitive periods, coordinated by the DLNR, when the bay would be closed to visitors. It is still a concept and would require coordination beyond HTA.

At Keaukaha near Hilo, cruise ship impacts drive the conversation ideas, and the community has pushed for a permanent role in shaping how visitor flow is handled around the port. A steward program piloted in 2023 is now being formalized rather than remaining as a short-term experiment.

South Point, or Ka Lae, sits on Hawaiian Home Lands, so the state’s role here is to support the Department of Hawaiian Home Lands’ existing plan rather than create a new one from scratch. Hilo itself is described as needing more visitor activity even as other Big Island sites seek to manage crowding.

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Kaena Point State Park OahuKaena Point State Park Oahu

Oahu: North Shore, pillboxes, and parking reality.

On Oahu, it’s the iconic North Shore that anchors the plan. Five sequenced actions are listed, but the first year focuses on studies, coordination, and groundwork.

There is no shuttle system scheduled for immediate rollout and no reservation platform ready to launch. During the public webinar, officials said any fees would be site-specific and pointed to the extremely limited parking infrastructure as a major constraint.

Lanikai Pillboxes and Maili Pillbox are cited as trails that have seen steep increases in use due to social media exposure. Lanikai already has daytime parking restrictions on residential streets between 10 am and 4 pm, and Maili has experienced a recent fatality. The plan for Lanikai is to evaluate managed access, while for Maili, it begins with determining who is responsible for the trail and what authority exists in order to manage it.

Downtown Honolulu appears in the draft as a future walkable corridor linking Iolani Palace, Honolulu Hale, and nearby historic sites and shops.

Waipo'o Falls Trail at Waimea Canyon KauaiWaipo'o Falls Trail at Waimea Canyon Kauai

Kauai: this waterfall became a neighborhood fight.

Hoopii Falls in Kapaa has become one of the most tense sites in the statewide plans. What was once a local waterfall became a high-traffic destination after intense social media exposure. The trail crosses private, lease, and state lands and is not formally maintained, and residents have placed rocks and tree stumps at neighborhood access points to slow or block visitor flow. The plan’s near-term focus is to gather more data and bring landowners together to clarify jurisdiction and what can legally be done before any formal access system is devised.

The Kapaa Crawl along Kuhio Highway is listed as a priority, but the proposed response, which is a shuttle and visitor hub concept centered on Coconut Marketplace, has no funding, no operator, and no timeline.

Kokee and Waimea Canyon are also included. Two of four proposed actions are already deferred beyond the first funding year, and the near-term steps focus has moved to installing visitor counters and studying whether a reservation system would be feasible.

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What changes on your next trip.

Across all four islands, social media is repeatedly cited as a significant accelerant, turning lesser-known spots into must-see stops almost overnight. And in that regard, there is no end in sight.

There are no additional statewide fees attached to these newly identified sites, no disclosed budgets for even the most ambitious concepts, and HTA does not gain or lose any new enforcement authority through these drafts.

If you are visiting in the coming months, you are unlikely to encounter reservation systems at Honolua Bay, formalized rest-day closures at Kealakekua, shuttles operating on the North Shore, or state-managed access changes at Ho’opi’i. Most of what is described for year one is groundwork.

You can review the full island-by-island drafts here: https://www.hawaiitourismauthority.org/what-we-do/destination-management-action-plans/

Do these plans go far enough or too far at the sites you know best?

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Hawaii County Surf Forecast for March 04, 2026 | Big Island Now

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Hawaii County Surf Forecast for March 04, 2026 | Big Island Now


Forecast for Big Island Windward and Southeast


Shores Tonight Wednesday
Surf Surf
PM AM AM PM
North Facing 2-4 2-4 2-4 2-4
East Facing 3-5 4-6 4-6 5-7
South Facing 1-3 1-3 1-3 1-3
TONIGHT
Weather Mostly cloudy. Numerous showers.
Low Temperature In the upper 60s.
Winds East winds 5 to 10 mph.
Tides
Hilo Bay High 1.9 feet 03:26 PM HST.
Low -0.1 feet 09:20 PM HST.
High 2.4 feet 03:40 AM HST.
WEDNESDAY
Weather Partly sunny. Numerous showers.
High Temperature In the upper 70s.
Winds East winds 10 to 15 mph.
Tides
Hilo Bay Low -0.1 feet 10:00 AM HST.
High 2.0 feet 04:04 PM HST.
Sunrise 6:37 AM HST.
Sunset 6:27 PM HST.

Forecast for Big Island Leeward


Shores Tonight Wednesday
Surf Surf
PM AM AM PM
West Facing 2-4 2-4 2-4 1-3
South Facing 1-3 1-3 1-3 1-3
TONIGHT
Weather Mostly sunny until 6 PM, then mostly
cloudy. Hazy.
Low Temperature In the upper 60s.
Winds West winds around 5 mph early in the
afternoon, becoming light and variable.
Tides
Kona High 1.5 feet 04:04 PM HST.
Low -0.1 feet 09:57 PM HST.
High 1.9 feet 04:18 AM HST.
Kawaihae High 1.4 feet 04:36 PM HST.
Low -0.1 feet 10:20 PM HST.
High 1.9 feet 04:38 AM HST.
WEDNESDAY
Weather Partly sunny. Hazy.
High Temperature In the mid 80s.
Winds Light and variable winds, becoming west
around 5 mph in the afternoon.
Tides
Kona Low -0.1 feet 10:37 AM HST.
High 1.6 feet 04:42 PM HST.
Kawaihae Low -0.2 feet 11:01 AM HST.
High 1.6 feet 05:13 PM HST.
Sunrise 6:41 AM HST.
Sunset 6:31 PM HST.

The current moderate northwest swell will continue a gradual decline through Thursday. A small west-northwest swell will arrive on Friday and hold through the weekend, followed by a small north-northwest swell early next week. Choppy east shore surf will build to near seasonal average by Wednesday as trade winds strengthen over and east of the islands. Little change is expected along east facing shores through the weekend, followed by a possible decline early next week if winds veer southerly. Surf along south facing shores will remain small to tiny through the weekend, and some islands may an increase in choppy surf if southerly winds develop early next week.

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NORTH EAST

am        pm  

ARTICLE CONTINUES BELOW AD
ARTICLE CONTINUES BELOW AD

Surf: Minimal (ankle high or less) surf.

Conditions: Semi choppy with ESE winds 5-10mph in the morning increasing to 10-15mph in the afternoon.

NORTH WEST

am        pm  

Surf: Minimal (ankle high or less) surf.

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Conditions: Clean in the early morning with ESE winds less than 5mph. Bumpy/semi bumpy conditions move in during the morning hours with the winds shifting W 5-10mph.

WEST

am        pm  

Surf: Minimal (ankle high or less) surf.

Conditions: Semi glassy in the morning with N winds less than 5mph. Bumpy/semi bumpy conditions for the afternoon with the winds shifting WNW 5-10mph.

ARTICLE CONTINUES BELOW AD

SOUTH EAST

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am        pm  

Surf: Minimal (ankle high or less) surf.

Conditions: Light sideshore texture in the morning with NE winds 10-15mph. This becomes Sideshore texture/chop for the afternoon.

Data Courtesy of NOAA.gov and SwellInfo.com



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