BermudaCahowCam
@BermudaCahowCam
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14:46 6/2 After a few tries, Jeremy manages to take the CahowCam1 female out of the nest chamber for a health check (previously she kept retreating into the tunnel):
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The lid in artificial Cahow burrows allows for the birds and their eggs to be taken out for health checks or to be retrieved during possible emergencies (rescue). 1/2
CahowCam1 male being removed from the nest for a health check, 2021:
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Until recently, no Cahow nested on Nonsuch or other larger Bermuda islands since the 1620s, when Cahow numbers dwindled because of the human settlers and the introduction of mammal predators.
Thanks to the Translocation Project, chicks started hatching on Nonsuch again in 2009:
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Four days old and already getting the feel of its tiny wing-nubs! Good reminder to stay optimistic and keep flapping :)
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Bermuda Skinks and Cahows (both critically endangered) seem to enjoy a symbiotic relationship. The first get to feed on the scraps in the burrows, while the latter get "house cleaning" services. Sometimes during checks a skink will be found huddling for warmth underneath a chick.
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Before fledging, Cahow chicks explore and imprint on the area for a few nights. They like to climb rocks, burrow lids, vegetation, and even Conservation Officers to exercise their wings and fledge.
Adults also like to observe the surroundings and take flight from higher ground.
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Here's a clip of the happy (and loud) reunion in CahowCam1 as the female walks into the burrow after recharging at sea.
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Last night an adult Bermuda Petrel returned to its burrow after having been away for months foraging over the north Atlantic. Stay tuned for what should be a month of canoodling and courting between mates as they prepare for the 2020 breeding season.
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12:50 3/14 The CahowCam2 chick receives a visit from a member of another endangered species, the endemic Bermuda skink.
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10/26 Guess who's back!
The Cahow breeding population is slowly returning to Bermuda as the courtship period begins. The CahowCam1 pair is already reunited. Jeremy checked both birds on 10/23. They're in good physical condition; the male weighs 375 g and the female 373 g. 1/2
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12:30 3/1 The CahowCam1 chick flaps its tiny wings:
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20:52 6/2 Before she leaves, the CahowCam1 female rearranges the nesting material in the burrow.
Here she's using her legs to kick and reposition the dry foliage.
Wouldn't it be nice if we could also clean and organize our homes by kicking stuff around?
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04:15 1/8 Watch as the CahowCam1 female lays her egg.
It's a rare sight, as we get to see the egg during the process, so don't miss it.
The female is the bird that's closer to the camera.
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01:19 6/11 She is finally ready. One last look back, and then she spread her wings.
Bada, the CahowCam2 chick, fledges.
Safe travels!
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The Cahow is the 3rd rarest seabird on the planet. It's recovering the fastest among those three thanks to 60+ years of management (Rewilding of Nonsuch Island, Cahow Recovery Project, Translocation Project).
Believed extinct for 330 years, Cahows now stand at 164 nesting pairs.
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01:47 4/27 In the CahowCam1 burrow, the chick flaps and stretches its wings. Wings can be also used for balance, though perhaps not always successfully.
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01:45 5/28 After practicing for her incoming flight by flapping her wings again, the CahowCam1 chick takes then the plunge.
She rises up in the air, seemingly without needing much effort, as she fledges out to sea.
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05:45 4/28 Our little explorer, the CahowCam1 chick, spent roughly 10 minutes in the burrow's tunnel and is now returning back into the nest chamber:
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On March 20, the very healthy CahowCam1 chick weighed in at 190g. Jeremy described the plump chick as a butterball and a gray fluffy dumpling. The chick weighed 178g on March 15.
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00:28 3/29 Time for a brief wing exercise in the CahowCam2 burrow:
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13:52 3/13 Here's Jeremy with the 3 day old CahowCam2 chick
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14:24 4/12 Jeremy then did a health check for the Burrow 1 chick who is "a muffin of a chick" and is at the "water balloon stage." The chick weighed 452g making it the heaviest chick on Nonsuch.
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08:38 3/19 While exploring the nest chamber, the CahowCam1 chick comes to say hi right up to the camera:
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23:06 4/18 In the CahowCam1 burrow, the male preens the chick also after the feeding. The chick spreads its wing over the male's head:
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A great example of how to greet your partner after spending months apart: Bermuda Cahows know how to do it right! The female returned last night for the first time in months to her mate, Allopreening, vocalizing, copulating & bonding are what Fall is about.
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Early morning break at 530 by the male—note the wet feet from his excursion and the gentleness as he nestles the egg underneath.
#CahowCam
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20:20 2/26 Listen to the Cahow chick vocalizing from inside the shell as the adult returns from a short break.
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20:10 3/9 A close-up of the CahowCam1 female and the chick:
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00:28 5/25 A moment of rest; in the CahowCam1 burrow, the female relaxes with the chick.
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23:43 4/21 It was bound to happen. Lately the chick was excreting close to the camera, almost hitting it a few times. Tonight the excreta finally hit the lens. It looks foggy now, but on the bright side, we have proof on camera that the chick is fed well. Literally on the camera.
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05:51 4/29 The CahowCam1 chick stretches its wings upon returning from a short excursion in the tunnel.
The wings are becoming too big to stretch fully in the nest chamber—quite a difference from the tiny stubs (with a wing chord of ~12 mm) at hatching.
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20:17 3/17 The CahowCam1 male is preening the chick before feeding it.
When a parent returns, a Cahow chick can get frantic when begging for food. Allopreening helps to calm the chick down, which in turn enables a successful feeding.
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2/23 Meet the first hatched Cahow chick Jeremy found this season during the nest checks (R819 nest, Colony A on Nonsuch Island). The chick was only 24-36 hours old and apparently was already fed.
Read the report and watch the video here:
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For the first few years, the CahowCam was only recording the footage, and then came the streaming as well (13 seasons so far).
Since 2017, it's a joint project with the Cornell Lab of Ornithology:
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Amazing! At 4:27 AM an egg appears after several moments of seemingly concerted effort by the female. Well done! Here’s to the start of another year on the Cahow Cam!
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A critically endangered, endemic Bermuda Skink visited the cahow burrow this morning. They are residents on Nonsuch, & serve as vital consumers of detritus in the burrows. Read more about the interrelationship here: & skinks here:
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01:41 6/7 A different cleaner/decorator comes to forage to the CahowCam1 nest. This land crab says hi to the cam and continues its work. Contrary to some crabs that dug, overturned, and made piles with nesting material, this one is a fan of minimalism, adding only small touches.
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5:41 10/27 The CahowCam1 couple -- after being separated by thousands of miles for the last 5 months they immediately rekindle their pair bond as if no time had passed.
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Around 19:20 an adult cahow channeled its inner “Kool-Aid Man” and burst into the chamber for the evening. Stay tuned and see whether the mate returns this tonight for more courtship and bonding!
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02:37 4/13 The CahowCam1 chick explores around the cam. Since its hatching on 2/27, the chick has been receiving ample food by the parents...and what comes in must come out the other end. Cahow chicks usually don't soil the nest; instead they go near a wall, turn around, and aim:
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00:39 4/16 As the CahowCam1 male returns to the burrow, the chick starts soliciting for food right away, while the male tries to preen the chick to calm it down first. This results in a merry chase across the chamber. Both birds vocalize.
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01:50 1/7 Watch the interaction and listen to the vocalizations between the CahowCam1 pair shortly after the male's arrival.
Did you miss them?
The female is in the front, incubating the egg, and the male is in the back.
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As the female moves, she reveals the CahowCam2 egg. The small dark dot at the top of the egg is a pip hole that the chick has pecked from the inside.
If you listen closely, you can hear not only the female's vocalizations, but also the vocalizations of the chick in the egg.
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02:10 6/2 After returning into the tunnel for a few minutes, the CahowCam1 female is now back in the nest chamber to rearrange the nesting material.
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01:19 4/30 The chick is busy with nestorations in the CahowCam1 burrow. Some leaves are trickier to reposition than others, but they unintentionally make for perfect fans:
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03:15 1/8 A shorter video of the CahowCam1 couple reuniting again and vocalizing loudly. The CahowCam1 female enters the burrow.
The pair was last together in the burrow at the beginning of November (the night on November 5. to 6., when the female left to forage).
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05:37 6/2 The CahowCam1 female poses nicely for the camera.
Will she leave before dawn or will she stay in the burrow over the day?
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Take a peek at how the CahowCam1 chick, Vega, grew and changed over time.
The images show Vega one day after she hatched (2/28), then one month (3/27) and two months (4/27) post-hatching, and finally on the night she fledged (5/28).
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10:54 6/23 There is a visitor in the CahowCam1 burrow... a White-tailed Tropicbird (also called the Bermuda Longtail)
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21:30-23:08 5/26 Here's a 2-minute highlight reel of the CahowCam1 chick's adventure outside her burrow last evening.
Before fledging out to sea, Cahow chicks spend a few nights training their wings and imprinting on the area.
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01:24 5/21 The CahowCam1 chick returns into its burrow and meets another chick there. The other chick, supposedly the R819 chick, then leaves the burrow soon after.
Both chicks vocalize as they interact, so turn the volume up.
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23:18 4/11 After the meal, the CahowCam1 male preens the chick again. Turn the sound on to hear the chick's vocalizations:
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As pelagic birds, Cahows return to their nests only to breed. Thanks to the CahowCams, we can see into their secretive burrow lives that would otherwise remain unknown.
Tens of millions of minutes have been watched by scientists, educators, and other viewers around the globe.
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03:17 3/11 The day-old CahowCam2 chick is now alone in the burrow. Watch the chick during preening, scratching, and even nest restoration.
Cahow chicks are precocial, meaning they are already quite highly developed when they hatch. The thick down keeps them warm in the burrow.
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06:55 3/28 The CahowCam2 chick was fed several times last night. What goes in must come out the other side.
Cahow chicks usually go near a wall, turn around, and only then excrete. This helps to keep the nest clean.
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00:36 3/20 The prospector returns from the tunnel into the CahowCam2 nest chamber, and after a bit, the CahowCam2 female follows.
The two need a moment to react. The CahowCam2 female defends the nest, and the prospector quickly leaves.
It seems no bird was hurt.
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01:03 4/20 The CahowCam1 female feeds the chick again.
While she made some frequent visits soon after the chick hatched, it seems she's back to her usual feeding strategy; she tends to take longer trips farther away from Bermuda, make fewer visits, but bring more food at once.1/2
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There were only 18 pairs at the start of the recovery program, going up to 160+ pairs today. That sparked concerns about inbreeding. As the research from
@BioQuestNGO
by
@CariGenetics
shows, luckily that doesn't seem to be the case. The CahowCam1 female is also part of the study:
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4/10 One month of growth.
Here's a comparison of the CahowCam2 chick during its first day of hatching (3/10) and the same chick today (4/10).
We see small changes every day, so it's easy to miss how much the chick has grown already:
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17:21 3/26 CahowCam1 chick on a lazy Saturday afternoon.
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Good News! The Yellow-crowned Night Heron, West Indian Top Shell, Land Hermit Crab & Bermuda Petrel or Cahow have all been successfully re-introduced to Nonsuch Island as part of the management program after being eradicated from the island by the early settlers in the 1600s.
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04:32 3/10 More allopreening by the CahowCam1 male. The chick seems quite vocal:
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There were only ~55 breeding Cahow pairs in 2000-2001, when Jeremy Madeiros took over the Cahow Recovery Program.
Since then, 2 new Cahow colonies have been established on Nonsuch Island (Translocation Project).
This season there were 155 Cahow breeding pairs, a record number!
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23:55 1/9 Look who's back! The female Cahow has returned to lay an egg.
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04:53 3/8 The CahowCam1 chick flaps its wings. A bit later, the chick explores the nest chamber, coming slightly closer to the camera.
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Nonsuch Island set a new record this year with 25 fledged Cahow chicks in comparison to 19 chicks last year!
Meanwhile, the combined number of fledged chicks across all the nesting islands reached 76 this season, which is close to the latest record of 78 chicks in 2021.
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Almost all the Cahow chicks are fed really well and are putting on weight at above-average rates. This means that there's a lot of food
in the ocean, while the high winds also enable the adults to collect it for the chicks and return back to the colony quickly.
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The female Bermuda Petrel (aka “Cahow”) reurned early this morning, just after midnight! If past years are any indication, she will lay an egg sometime in the next 24 hours or so. Watch live at and
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04:57 1/14 The CahowCam1 pair is still together in the nest burrow.
A tender moment between the two as the female is incubating the egg:
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22:43 6/5 And just like that, the CahowCam2 chick flies away. After a few warm up wing exercises, she makes lift off look effortless. Be safe little one.
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03:55 4/21 The CahowCam1 chick is apparently inspecting the camera and the walls around it, so we get a close-up of the chick:
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In total, it looks like there might be up to 25 or more Cahow chicks on Nonsuch Island this season. This means the two colonies there are on a good path to break last year's record of 19 fledged Nonsuch Cahow chicks. Fingers crossed!
CahowCam1 chick from the Colony A on Nonsuch:
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06:04 4/11 Good morning! In the CahowCam1 burrow, the chick is busy with nestorations. When the chick is turned away from the camera, it looks like a jiggly ball of fluff:
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Read about the amazing "Rewilding" effort on Nonsuch Island, now running for 60+ years.
As one of the earliest experiments of Ecological Restoration, it was at first considered a fool's errand, but today the island is home to a number of Lazarus species, including the Cahow. 1/2
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Here's a clip of the CahowCam2 chick at three points during hatching.
The partially hatched chick is moving around;
the chick is fully hatched and being covered with leaves by the parent (male) during nestorations;
and finally the chick is in full view. Look at the fluff!
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Woo-hoo! The Mohamed bin Zayed Species Conservation Fund (MBZF) has awarded a special “Chairman’s Award” in support of the Nonsuch Expeditions ongoing conservation efforts with the Bermuda Governments Department of the Environment and Natural Resources
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21:44 3/15 The CahowCam2 chick shows that you are never too young to start exercising your wings (even if they are tiny).
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21:25 3/27 The fat little "water balloon" (to quote Jeremy) is getting fed again tonight.
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The CahowCam1 pair has been nesting on Nonsuch Island together since 2010.
The female (left) and her mate (right) were both translocated as chicks from the small nesting isles in 2006. During translocation, each was fed by Jeremy for a few weeks before fledging to sea.
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06:49 3/17 The CahowCam1 chick, looking like a ball of fluff when resting, makes sure we don't miss its pretty bill and wings. Some flapping of wings:
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02:24 4/3 The CahowCam2 chick is small but getting bigger little by little. Its webbed feet are growing nicely, the wings are slowly developing, and the bill seems longer too.
Its "sound system" is also upgraded from mere "squeaky toy" chirps to "whistling kettle" sounds:
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Vega, the CahowCam1 chick, has recently fledged (image taken prior to that). With some luck, we can expect to see her again in 4-6 years. That's how long female Cahows spend at sea on average before returning to Bermuda to mate, if they survive the trying first years at sea. 1/2
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2:30 4/12 The big winner last night was the CahowCam2 chick who had both parents in the burrow at the same time.
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03:25 2/29 The CahowCam1 chick keeps busy.
Within a few days after the chicks hatch, the parents usually start spending most of their time foraging at sea.
This means that apart from the feeding visits from parents, the chicks spend most of their time alone in the burrows.
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20:41 3/11 After spending the day foraging at sea, the CahowCam2 male is back and reunited with the chick.
Watch their interaction. Once the chick realizes the visitor is not an intruder, it calms down.
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Bada, the CahowCam2 chick, fledged on 6/11.
Here's a comparison of her development from the day she hatched and up to one month, then two months, and lastly three months, as captured by the CahowCam2:
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The CahowCam2 male was checked on March 20 and weighed in at 412g which is very heavy. Jeremy raised this bird as a chick and is very proud of how productive he has been as a breeding adult.
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05:04 3/31 The CahowCam1 chick's exploration of the nest chamber earlier this morning:
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Precious cargo:
This is how Cahow chicks were transported from the smaller nesting isles to Nonsuch Island during the translocation. (The boxes with the chicks were transported by boat.)
The same method of transport is used for rescued chicks.
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06:12 2/29 The CahowCam1 chick "poses" prettily for the camera:
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06:39 3/22 The CahowCam1 chick is exploring the nest chamber:
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16:52 11/2 Senior Terrestrial Conservation Officer Jeremy Madeiros checks on the Cahow who arrived overnight. It is the male of the CahowCam2 pair who is weighing in at a whopping 441g.
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Watch as an endangered seabird lays her egg LIVE on the CahowCam! Just min ago this Bermuda Petrel laid her single egg w/her mate looking over. The female will return to the sea to refuel while the male takes the 1st incubation shift.
@Nonsuch_Bermuda
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04:21 4/2 The CahowCam1 male has returned to the burrow and is preening the chick before feeding it.
It seems the rambunctious little chick would rather skip the preening and go straight to the meal:
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01:39 4/18 In the CahowCam1 burrow, the chick shows off its wings and legs while doing some stretches:
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20:48 2/11 The CahowCam1 male is wearing a lovely leaf hat this evening while doing some nestorations.
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