Archive for the ‘RH58’ Category

Another pup has graduated to “weaner-hood” and received her (yes, female) official flipper tags. Meet RL58. Her mom, the renowned RH58 (Rocky), nursed PK5 for 45 days.

At tagging, RL58 measured 118 cm long and 96 cm around (girth). She’s reportedly doing well, even holding her own with RN44 (male) who has been spotted wrestling and swimming with her. A feisty female is good;-)

Here are some photos of her post-tagging.

(PC: M. Olry)





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On two consecutive days in July, two female Hawaiian monk seals hauled out onto the beach with heavy bellies and gave birth to pups. Since then, both pups have progressed as expected–nursing and gaining weight, losing their fetal folds; swimming in short bursts in shallow waters, then progressing to deeper water and longer swims. Now, pups are starting to molt their lanugo coats; as typical, most notably in their faces. There’s been no official confirmation of gender yet; however, typically, it takes longer to positively identify females. In the case of endangered Hawaiian monk seals, the more females, the better, so delays of this kind tend to bode well.

What follows are slide shows of PK4 and PK5. Both sets of photos were taken on August 12th. (FYI: Because PK3 was born  in a remote location, we do not have regular photo updates.)

Here’s RK28 and PK4, who was born on July 19th.

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And here’s RH58 (Rocky) and PK5, who was born one day later on July 20th.

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Field Report: July 2019

The Kauai team logged 239 seal sightings this month. This included 28 individually identified seals.

July: 239
June: 179
May: 262
April: 348
March: 350
Feb: 303
Jan: 284


  • RK30 gave birth to PK3 on July 10 at a remote site along Na Pali coast that is accessible only by water. Kayak Kauai took signs out to post in key areas nearby.
  • RK28 gave birth to PK4 on July 19 at another remote location. Pup is thriving. Two stray German Shepherds were captured running loose near the newborn pup, on the day of birth and while RH58 was in labor.
  • RH58 gave birth to PK5 on July 20 just down the coast from RK28. With permission from NOAA, the Kauai team had to intervene and cut the umbilical cord to remove the placenta, which was still attached more than nine hours after birth.


  • RH38 was released on July 22 after transport from Ke Kai Ola aboard a USCG C-130. Since then, she’s ranged across the North Shore and the Na Pali coast in the weeks following release and has showed no signs of interest in people on the beach or in the water.
  • The first two 2019 pups, RL08 and RL52, continue to thrive and range farther from their natal sites.
  • Displacements: 2 displacements occurred this month. Both were to remove S/F R7AA from the road edge. She was displaced a third time on Aug 1 from the Lawai Beach road edge as well.
  • Molting: 3 seals were observed molting this month.
  • Vaccinations: None given this month.

Research/Support of Pacific Islands Fisheries Science Center

  • Sub-sampled scat, molt, placenta, and tissue plug samples accordingly.
  • Logged all seal sightings for PIFSC database. Organized photos and reported sightings, molt tallies, survival factors to send to PIFSC.

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Predicting delivery dates of babies is hard. Without the aid of physical examinations and sonograms, it’s even harder to predict the birth dates of Hawaiian monk seals. And yet NOAA has gotten pretty darn good at it.

RK28 was expected to give birth around July 13th. She pupped on July 19th. (Note the “milk nose.” That’s one of the indicators that a pup has figured out how to nurse.)

PK4 Milk Nose

PC: VJBloy

PK4 in the Rain

PC: VJBloy

On the same day PK4 was born, two loose dogs were reported romping in the surf just down the beach from RK28 and pup. Thankfully, friendly people on the beach caught the dogs and prevented them from harming the seals. You may recall that RK28 lost a pup due to a dog(s) attack several years ago. You can read more about that tragedy here. So, this is a good opportunity to remind people not to let their dogs roam free.

One day later, RH58 gave birth to PK5.

RH58’s due date was predicted as August 1st, give or take. Instead, she pupped on July 20th. This was particularly challenging due date to estimate, since RH58, also known as Rocky, pre-weaned her pup last year after several pup-switches. You can read more about that here. But as these photos show, Rocky and pup are doing well and bonding nicely.

Rocky Napping on PK5

PC: VJBloy

PK5 and Rocky Napping

PC: VJBloy

PK5 Nursing

PC: VJBloy


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In the Hawaiian monk seal world, the term “logging” refers to a behavior performed by monk seals when they float on the surface of the ocean–not actively swimming–for extended periods of time. This time of year, it’s a behavior some very pregnant seals may exhibit in the days leading up to their delivery.

In the coming weeks, several females who regularly pup on Kauai may be seen logging in shallow water. Based on their pupping dates last year, these females anticipated due dates are as follows:

  • RK22 – June 22. (Although there’s no sign of her yet.)
  • RK30 – July 1.
  • RK28 – July 13
  • RO28 – July 16
  • RH58 – August 1

Logging by near-term pregnant females is natural behavior in monk seals. However, extended periods of logging can also be symptomatic of underlying health problems. When RK13 was healing from a suspected shark bite, she spent a fair amount of time logging in the shallow water of freshwater canals.

Logging can also be a symptom of toxoplasmosis, a disease that can be deadly to monk seals. Toxo is the number one disease threat to Hawaiian monk seals.

The parasite Toxoplasma gondii is a microscopic, single-cell organism. Just one of their eggs—known as oocysts— is enough to kill a monk seal. A single cat can excrete 145 billion eggs per year in its feces, according to DLNR. It’s a staggering number.

According to this NOAA report, “The parasite that causes ‘toxo’ sexually reproduces in cats, which shed T. gondii eggs into the environment via their feces. The feces of just one cat contains millions of T. gondii eggs that survive in the environment for many months.

“Any warm-blooded animal, including humans, can contract toxoplasmosis by ingesting a single T. gondii egg — and cats are essential for the reproduction and spread of the parasite.”

Since 2001, eleven Hawaiian monk seals have died of toxoplasmosis. Logging is one behavioral symptom. Of the 11 confirmed deaths due to toxo, eight were female. At least, two were pregnant. Unfortunately, once the disease progresses to the point of visual symptoms like logging, it can be too late for veterinarians to help. It’s not an easy death, either. It’s suspected the near-shore logging behavior occurs, because it’s too painful for the seal to haul out on the sand. In the days leading up to RB24‘s death due to toxoplasmosis, she was reported logging in canals on Oahu.

It can seem like a weird thing–how can the feces of pet (and feral) cats kill Hawaiian monk seals? To help explain, NOAA created this infographic and fact sheet. More information about toxoplasmosis can be found here and here.

And if you see a logging seal–whether pregnant or not–please report it to the Hawaiian monk seal hotline at 808-651-7668.

Screen Shot 2018-03-26 at 1.38.30 PMScreen Shot 2018-03-26 at 1.38.43 PM



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Every month, anywhere from 30 to 38 individual Hawaiian monk seals are reported to the Kauai Hawaiian Monk Seal Conservation Hui. But just who are these regulars? Here’s a look at the top ten most reported Hawaiian monk seal sightings on Kauai this year to date.

Keep in mind, many things affect this list. Monk seals often have favorite haul out locations. If a monk seal favors a location that happens to be easily accessible by humans, bingo, that seal will be reported more often to the hotline.

Then, of course, monk seal moms and their pups rack up a high number of reported sightings, because they stick to the same beach for weeks on end. As this list will also reveal, young monk seals–especially sub-adult males–are often sighted and reported, too.

  1. With 83 sightings, adult R7GM tops the list of most reported monk seal sightings on Kauai this year.  A female, it appears R7GM may be pregnant for the first time. If she pups on Kauai, her chances skyrocket for remaining at the top of this list for 2019.
  2. With 81 sightings, R3CX ranks second for the most reported monk seal sightings on Kauai. R3CX is a five-year-old male commonly seen roughhousing with other young males on Poipu Beach.
  3. With 65 sightings, RG58 ranks third for the most reported monk seal sightings on Kauai. RG58 is a four-year-old male who also prefers the busy beaches of Poipu. His mother is the renown RH58, also known as Rocky.
  4. With 56 sightings, RB00 ranks fourth for the most reported monk seal sightings on Kauai. The year’s first report of RB00 came two days before she gave birth. She nursed for 54 days and immediately left Kauai after weaning her pup. Recently, RB00 was sighted on Maui. RB00 also counts Rocky as her mother.
  5. With 53 sightings, RK52, yet another offspring of the prolific Rocky, ranks fifth on our list. She provided us with Kauai’s second pup of the year. She nursed for 36 days.
  6. With 53 sightings, RN44 ranks sixth for the most reported monk seal sightings on Kauai this year. He is a healthy six-year-old male, frequently sighted on his natal beach on the North Shore of the island. His mother is also Rocky.
  7. With 52 sightings, RL08 is the grandson of Rocky. He was born to RB00 earlier this year and nursed for a whopping 54 days.
  8. With 50 sightings, RK58 ranks eighth for the most reported monk seal sightings on Kauai this year. Another pup of Rocky’s, RK58 was abandoned by his mother in 2018 and spent several months in rehab at Ke Kai Ola before being released back on Kauai.
  9. With 41 sightings, RK30 ranks ninth for the most reported monk seal sightings on Kauai this year. RK30 is pushing 20 years of age. She’s also one of the most storied monk seals around, having survived many threats to her life. Read more about RK30 here.
  10. With 40 sightings, RG22 ranks tenth for the most reported monk seal sightings on Kauai this year. RG22 is another four-year-old male who loves to roughhouse with the boys at Poipu.

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No sooner than RB00 weaned her pup and RL08 was tagged than eight-year-old RK52 gave birth to a healthy pup on April 9th. After several days of observation, it’s been reported that PK2 is a boy. That makes two males for 2019.

RK52 is proving to be a solid mother, consistently chasing away other curious seals such as chunky RL08 and several other juvenile seals in the area. She was rather tolerant of them being within 10 feet of the pup for the first week, but her patience seems to be wearing thin over the past week, and she is now consistently shooing away others seals with aggressive posturing and vocalizations. The pup is a strong swimmer and is quickly gaining weight. Both mom and pup are doing well.

You may recall that RK52 gave birth to a stillborn pup last year. As far as we know, this is her second pup.

Both pups of 2019 are descendants of the legendary RH58, called by many as Rocky. RH58 herself appears pregnant again this year. As does another Kauai regular, RO28, so we can likely expect a couple more pups this summer.

Here are a few images of PK2’s first days of life.


PC: Gary Langley


PC: Gary Langley


PC: Gary Langley


PC: Gary Langley


PC: Gary Langley


PC: Gary Langley

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