GROUPER AT THE CLEANERS: PICTURE PERFECT BAHAMAS (5)


GROUPER AT A CLEANING STATION: PICTURE PERFECT BAHAMAS (5)

BLACK GROUPER AT A CLEANING STATION (Melinda Riger @ G B Scuba)

This black grouper (‘Arnold’) is at a so-called CLEANING STATION, being groomed by gobies. The process is an example of species symbiosis known as MUTUALISM. This is a transaction between individuals of two species that is mutually beneficial. Here, the primary creature pauses at a locally familiar cleaning station and allows itself to be expertly cleaned by tiny fishes such as gobies and wrasses to remove parasites, dead skin and so forth. This nurture even includes, as here, inside the mouth and gills. The gobies benefit by feeding on the proceeds of their endeavours removed from the host (or ‘client’ as one might say). And of course, in return for their favours a collateral benefit is that they can feed freely without being eaten by a potential predator. 

Credit: Melinda Riger / Grand Bahama Scuba

MANATEES: PICTURE PERFECT ON ABACO (4)


MANATEES: PICTURE PERECT ON ABACO (4)

MANATEE APPRECIATION DAY 2020West Indian Manatee, Abaco, Bahamas (Charlotte Dunn / BMMRO)

Mrs RH and I are sticking to self-isolation right now (we are fine, but thank you for asking). However I am already breaking my current self-imposed ‘single-picture-and-not-much-writing’ regime with today’s creature feature. The excuse? It is of course the last Wednesday in March and as everyone must know it is Manatee Appreciation Day.

Anyone can (and indeed should) appreciate manatees anywhere at any time, and their contemplation is a way to lift the spirits. They were first found in Abaco waters about a dozen years ago. BMMRO reported their movements and the ongoing research. Later, Bahamian locals enthusiastically followed the lives of Gina, Rita, Georgie, Randy & co; and the calves such as JJ and Sayle (winning name in a public competition). Citizen scientist reports were invaluable to the research. Unsurprisingly, since Hurricane Dorian reports have greatly reduced. Manatees may well still be around but even now, 6 months later, trichechi sightings are sporadic. There are other concerns, after all.

West Indian Manatee, Abaco, Bahamas (Charlotte Dunn / BMMRO)

Manatees love the camera and, Madonna-like, are often pleased to ‘strike the pose’. Of a sort.

West Indian Manatee, Abaco, Bahamas (Charlotte Dunn / BMMRO)

West Indian Manatee, Abaco, Bahamas (Charlotte Dunn / BMMRO)

Today the Marine Conservation Society (MCS) showed their appreciation for manatees with a superb image and an excellent set of Manatee Facts that I recommend to anyone who has read this far. For example, recent broadcasts and news articles have featured the importance of seagrass. You will see that it is the primary diet of manatees. 

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Happy #ManateeAppreciationDay! ☺️ We have a great photo-feature of these amazing animals in the Spring issue of our magazine coming to all members in the next few days but whilst you wait, here are some fun facts about them: ⠀ ⠀ 💙The manatee, also known as a 'sea cow', is a large marine mammal with an egg-shaped head, flippers and a flat tail. ⠀ 💙Manatees range in size from 8 to 13 feet (2.4 to 4 meters) and can weigh 440 to 1,300 lbs. (200 to 590 kilograms). ⠀ 💙Although they may seem like cumbersome creatures, manatees can swim quickly and gracefully.They have strong tails that power their swimming and usually swim about 5 mph but they can swim up to 15 mph (24 km/h) in short bursts ⠀ 💙There are three species of manatee: the Amazonian manatee, the West Indian/American manatee and the African manatee. ⠀ 💙Manatees often swim alone or in pairs. If manatees are seen in a group (called an aggregation), it is either a mating herd or an informal meeting of the species simply sharing a warm area that has a large food supply. ⠀ 💙Manatees are herbivores. At sea, they tend to prefer sea grasses. When they live in rivers, they consume freshwater vegetation. Manatees also eat algae. It's reported that a manatee can eat a tenth of its own weight in 24 hours! ⠀ 💙The IUCN's Red List of Threatened Species lists all manatees as vulnerable or endangered and facing a high risk of extinction. ⠀ Manatees are thought to have evolved from four-legged land mammals more than 60 million years ago. Except for the Amazonian manatee, their paddlelike flippers have vestigial toenails — a remnant of the claws they had when they lived on land. ⠀ 💙Manatees' eyes are small, but their eyesight is good. They have a special membrane that can be drawn across the eyeball for protection. ⠀ 💙Manatees don't always need to breathe. As they swim, they poke their nose up above the water's surface to catch a few breaths every few minutes. If they are simply resting, they can stay under the water for 15 minutes without taking a breath ⠀ ⠀ #marinemammal #marineconservation #marnebiology #marinelife #oceanlife #oceanindoors #manatee ⠀ ⠀

A post shared by Marine Conservation Society (@mcs_uk) on

Credits: Photos #1 – #4 Charlotte Dunn / Bahamas Marine Mammal Research Organisation (BMMRO) and #5 Caine Delacy / BMMRO; MCS UK

MCS links: https://www.mcsuk.org; https://www.facebook.com/mcsuk/

Gina with her calf SayleWest Indian Manatee, Abaco, Bahamas (Caine Delacy / BMMRO)

CUBAN EMERALD (f): PICTURE PERFECT ON ABACO (3)


CUBAN EMERALD (f): PICTURE PERFECT ON ABACO (3)

I spent a wonderful 15 minutes with this little Cuban Emerald hummingbird (Chlorostilbon ricordii), which I found perched on a stick in a small clearing in the coppice at Delphi. I was several feet away when I first noticed it, so I spent some time inching forward towards it. Even from a distance, the metallic sheen of the feathers glinted in the bright sunlight. The bird watched me, tame and unruffled, as I approached. I took photos as I moved closer so that if it flew off at least I’d have something to remember it by. In the end it let me get so close that I could almost have touched it. When I’d taken some close-ups, I backed very slowly away. The little beady black eyes followed my retreat with interest. The bird was still happily perched on the stick when I lost eye-contact with it. In the end I was more moved (in one sense) than it was (in another).

Credit: Keith Salvesen / Rolling Harbour

KILLDEER: PICTURE PERFECT ON ABACO (2)


KILLDEER: PICTURE PERFECT ON ABACO (2)

Killdeer, Abaco Bahamas (Bruce Hallett / Birds of Abaco)

For the time being, while things are a bit crazy, I’ll be posting single / pairs of images that in my view are so excellent that they stand alone without needing any comment from me, annoying wordplay, or musical digressions. All have been taken on Abaco Bahamas. Only some will be my own – the bar is set at a DSLR height that exceeds my camera skills. 

Credit: Bruce Hallett

RUDDY TURNSTONES: PICTURE PERFECT ON ABACO (1)


RUDDY TURNSTONES: PICTURE PERFECT ON ABACO (1)

Ruddy Turnstone, the Marls, Abaco, Bahamas (Tom Sheley)

I very rarely – almost never –  publish single or pairs of images, not least because I enjoy the bits of research and writing that cover a topic more thoroughly. However, today I was going through the photographic archive from my book BIRDS OF ABACO and came across these RUTUs photographed on the Marls by contributor Tom Sheley.

TBH turnstones are among the easiest shorebirds to photograph. They are pleasingly tame, so you can get quite close to them without ruffling their feathers. They aren’t tiny and they are pretty and quite colourful. And they are fairly abundant and so not hard to locate… but they make it hard to get a really good bright, clear photo. Or is that just me…? Anyway, Tom definitely has the camera skills required.

Ruddy Turnstone, Abaco, Bahamas (Tom Sheley)

DOLPHINS IN THE SEA OF ABACO, BAHAMAS


DOLPHINS IN THE SEA OF ABACO, BAHAMAS (BMMRO)

Dolphin mother and newborn calf

DOLPHINS IN THE SEA OF ABACO, BAHAMAS

The bottlenose dolphin photos here, taken during a recent BMMRO dolphin research project in the Sea of Abaco, are of great significance. Six months after Hurricane Dorian smashed the life out of Abaco, the island is still in the early stages of recovery – to the extent that recovery is possible when the main (only) town has been pulverised to rubble and the island’s infrastructure wrecked. Good news is prized.

DOLPHINS IN THE SEA OF ABACO, BAHAMAS (BMMRO)

Amidst the human cost of Dorian to the Abaco community, people have found some consolation in the natural world around them. The return of birdsong. The bright flashes of the unique parrots flying overhead. Shorebirds returning to the beaches from wherever they found for cover. Curly-tail lizards sunning themselves. And on water, sightings of turtles, rays and dolphins to spread some cheer. Some huge bonefish are being caught (and released) too.

DOLPHINS IN THE SEA OF ABACO, BAHAMAS (BMMRO)

The Bahamas Marine Mammal Research Organisation (BMMRO) has its HQ at Sandy Point. During the past months, life there has been busy. A long-term underwater acoustic research project is in progress, for example. The effects of the hurricane on the marine mammals in Abaco waters – whales , dolphins and manatees – has been a cause of great concern. A drop in the dolphin population in the Sea of Abaco had been noted a few months ago, so a second assessment of the area has just been carried out.

DOLPHINS IN THE SEA OF ABACO, BAHAMAS (BMMRO)

Playtime in the Sea of Abaco

GOOD NEWS FOR DOLPHINS

Scientists Diane Claridge and Charlotte Dunn obtained positive results. During the assessment,  they encountered 18 individual dolphins. The encouraging observations included:

  • The wonderful mother and newborn calf in the header image – a great sign of hope
  • Some dolphins first recorded – amazingly – in 1992
  • Dolphins in areas not used for years, probably due to recent reduced boat traffic
  • Familiar dolphin behaviours such as wave-surfing and group socialising
DOLPHINS IN THE SEA OF ABACO, BAHAMAS (BMMRO)

Ragged dorsal fin patterns enable easy ID

If you wonder how researchers can be so sure about the ID of the animals they see, check out the dorsal fins in some images here. Individual dolphins have unique patterns, markings (#2) and in particular fin damage that is readily identifiable. Seen close to, these are obvious. At a longer distance, binoculars are needed. Photos of each animal are also taken to be analysed in the lab. Sound recordings may be taken: distinctive individual voice patterns are analysed to assist ID. All of this can be compared against the BMMRO database. That is how dolphins first recorded in 1992 can be identified with such certainty now.

Credits: Charlotte Dunn (photos) and Diane Claridge, BMMRO; the dolphins for research cooperation 

If you would like to know more about the work of BMMRO and its research, click the logo above

DOLPHINS IN THE SEA OF ABACO, BAHAMAS (BMMRO)

ON THE WING: BLACK-NECKED STILTS, ABACO, BAHAMAS


Black-necked Stilt in flight, Abaco Bahamas (Alex Hughes)

ON THE WING: BLACK-NECKED STILTS, ABACO, BAHAMAS

Black-necked stilts Himantopus mexicanus may be the most elegant shorebirds you will ever see. They are permanent residents on Abaco and not uncommon where they are found. It could be on a beach; more likely it will be in or around brackish ponds. It won’t be in the pine forest or coppice.

Black-necked Stilt in flight, Abaco Bahamas (Alex Hughes)

The rather disorganised stilt flying in the header image rather undercuts my claim for elegance, I realise. The image above of the bird at full stretch against a background of waves gives a much better idea of the beauty of this species. 

Black-necked Stilt in flight, Abaco Bahamas (Alex Hughes)

Gilpin Pond is a good place to see stilts, and in summer they nest around the perimeter. A word of warning: they may be aggressive in the breeding season. I got too near a nest once and the female shouted at me then flew straight at my head. I hadn’t even realised there was a nest there until this happened, so her actions rather give the game away.

Black-necked Stilt in flight, Abaco Bahamas (Alex Hughes)

In common with some smaller shorebird species – for example, plovers and killdeer – the stilts have another defensive method to protect their young, a so-called ‘distraction display’. When their nest is under threat,  one of the adults will pretend to have a damaged or broken wing and so be unable to fly. It will flutter feebly along the ground, moving further and further away from the nest, diverting attention from it. It’s an amazing sight to watch the tactic in action. Check out this video to see examples of this behaviour.

Credits: all photos by Alex Hughes, one of the photographic contributors to The Birds of Abaco; video Nat Bel