RUDDY TURNSTONES: PICTURE PERFECT ON ABACO (1)

March 12, 2020 by Rolling Harbour

RUDDY TURNSTONES: PICTURE PERFECT ON ABACO (1)

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.

‘EAGLE EYES’: NEW BALD EAGLE SIGHTING(S) ON ABACO

May 30, 2017 by Rolling Harbour

‘EAGLE EYES’: NEW BALD EAGLE SIGHTING(S) ON ABACO

In March, I posted about a bald eagle spotted by a Delphi fisherman out on the Marls near Big Pine Point. He didn’t know it at the time, but it was a very rare sighting of this magnificent raptor. The bird is classified for Abaco as a V4, which is to say an extremely unusual vagrant (but not quite a ‘one-off’ V5).

You can read all the details HERE, but to summarise, the only previous Abaco sightings were 3 years running over 2000 – 2002, at the end of each year. The annual visits over such a short time-span suggest that this may have been the same bird each time. So this March’s report is possibly the second bald eagle ever seen on Abaco… and on any view, the fourth.

Now comes the news of another bald eagle sighting in the last couple of days on the Marls, this time by Danny Sawyer while out fishing. The bird was sighted approx 1.5 miles west of the airport / 2 miles south of Bustic Point. Danny’s FB post has unsurprisingly attracted quite a number of comments – and even some more sighting reports. Here’s the list so far…

BALD EAGLE SIGHTINGS REPORTED ON ABACO SINCE c1950 (= ‘ever’)

2000 December, location unknown – info from Woody Bracey
2001 December – Chicken Farm area – Betsy Bracey
2002 December – over Marls opposite Treasure Cay – Woody Bracey
2004 Autumn – south of Lynard Cay (after hurricane) – Cheryl Noice
2014 Date unknown – circling the power plant – LC
2017 March – Big Pine Point, Marls – James Cheesewright
2017 Early May – Power plant area – LC
2017 May – Marls – Danny Sawyer
2017 May – Lubbers / Tahiti Beach area – ‘Kelly’s mom’
2017 September – Cross Harbour – Carol Rivard Roberts (with photo)

Italics indicate a report in comments on Danny’s FB page; Blue = added reports

So far, however, there has been no photograph of an ‘Abaco’ bald eagle. It’s fair to say that the official verification of a sighting generally requires a photograph – more especially where there is a risk of confusion with a native bird (eg some warblers). But there really is no mistaking a bald eagle. For obvious reasons it is surely one of the most recognisable raptors of all. And the only Abaco candidates for confusion would be a turkey vulture or an osprey. A quick look shows very little scope for confusion with either:

Bald eagle in flight. Note: dark brown, head & tail bright white, huge yellow beak and feet

Turkey vulture & Osprey for comparison. No comparison, in fact

ABACO BALD EAGLE CHALLENGE

How about being the first person to capture an Abaco bald eagle on ~~film~~ digital media? The kudos! The traditional Rolling Harbour bottle of Kalik is already on ice in the expectation of a usable image, together with the accurate location… Failing that, all reports welcome anyway.

Credits: all brilliant eagle photos by very kind permission of Brian Lockwood, taken in his backyard in Poquoson, Va. except eagle in flight, Carol Robertson (wiki); TUVU (Bruce Hallett); Osprey (Craig Nash); Amusing Cartoon, Birdorable

BALD EAGLE ON THE ABACO MARLS: EXTREMELY RARE SIGHTING

March 24, 2017 by Rolling Harbour

BALD EAGLE ON THE ABACO MARLS: EXTREMELY RARE SIGHTING

On March 22nd a friend of ours, James, was bonefishing far out on the Abaco Marls when he was astounded to see the unmistakable appearance of a bald eagle Haliaeetus leucocephalus flying above him. His boat partner and guide Joe also saw the bird. James is a very experienced birder, and has seen plenty of bald eagles over the years. He was not to know, at the time, what an exceptionally rare sighting this is. The location was in the area of Big Pine Point.

SIGHTING REPORTS

If you are out on the Marls and see this bird, please can you add a comment to this post or contact me at rollingharbour.delphi@gmail.com, giving the date, time, approximate location… and if possible attaching a photograph. Any reports will add important data to the archive for the birds of Abaco, and of the Bahamas generally.

PREVIOUS ABACO SIGHTINGS

I checked Tony White’s compendious checklist compiled for BIRDS OF ABACO that contains all species recorded for Abaco since 1950. He categorised the Bald Eagle as a ‘V4’, indicating a vagrant species with a handful of irregular sightings – ever. I then contacted Bahamas bird guru Woody Bracey to check the details of earlier sightings. The answer is:

“Bald Eagles were sighted on Abaco three years running 2000-2002. In each instance it was over the Christmas Holiday period (12-20-1-10). I saw one in 2002 from the overlook near Treasure Cay looking out over the marls. Betsy (Woody’s wife) saw one over the chicken farm fields in 2001 but I missed it”.

Some people might mistake the Caribbean subspecies of Osprey (an all-white head) for a Bald Eagle but as Woody points out, “their flight and shape are very different”.

WHAT DO I LOOK OUT FOR? A large raptor with a dark body and wings, and a distinctive white head and tail

HOW CAN I TELL IT FROM AN OSPREY? By comparison with this Abaco Osprey

WHAT DO I LISTEN OUT FOR?

Image / audio credits: open source / David R Tribble / Craig Nash (Osprey)

MANGROVE DIE-BACK IN THE ABACO MARLS: THE FACTS

September 1, 2015 by Rolling Harbour

MANGROVE DIE-BACK IN THE ABACO MARLS: THE FACTS

For some time now, there has been understandable concern about the increasing evidence of mangrove die-back in the Abaco Marls and elsewhere in Abaco waters. Scientific investigations are ongoing and you will find some of the survey results so far on the excellent Abaco Scientist interactive map HERE. You’ll find other relevant and authoritative mangrove material if you check out the BLOG menu of the website.
Abaco - The Marls

The ‘200 sq. miles’ in my map is debatable, depending what one includes. Other estimates are of 300 or even 400 sq. miles. Whichever, the Marls cover a massive area of mangroves, islets, flats, channels and wonderfully diverse wildlife. A large proportion of the many species – fish, birds, turtles etc – depend on the complex ecology of the mangroves for food, shelter and breeding. Depletion of the mangroves from whatever cause will have a direct effect on the creatures of the Marls.

Ryann Rossi, a PhD student with North Carolina State University, has been researching the worrying phenomenon of mangrove die-back in the Marls this summer. She has written an interesting and informative account (conveniently in the RH ‘Facts about…’ style) that was published in Abaco Scientist last week. The blue links will take you to the ABSCI site for further information on each topic. I’m grateful to Ryann and ABSCI for permission to use the material.

Five Things to Know About the Mangrove Die-back in The Marls (at this point, anyway)

1. This die-back appears to be the result of multiple stressors acting together. Think of it in the sense of our own body – when our immune system is down, we are often more susceptible to getting sick. The same thing is likely happening to the mangroves.

2. It appears as though a fungal disease may be taking advantage of already stressed mangroves and causing die-back. We did preliminary surveys across Abaco and found fungal lesions nearly everywhere. However, the fungus was present in different densities in different areas. In the die-back area nearly all the leaves remaining on trees have lesions. We think that this pathogen capitalized on the mangroves being weakened by other stressors such as hurricanes, which cause extensive leaf drop, change in the movement of water, change in sedimentation and erosion.

3. We are still working on identifying the pathogen associated with the lesions we’ve found. We are confident that it is a fungus and are currently growing fungal cultures in the lab to examine defining morphological characteristics in addition to using DNA sequencing to identify the culprit.

4. We have documented the presence of the Robust Bush Cricket (Tafalisca eleuthera) in the die-back areas as well as other areas with high densities of lesions. These crickets are documented to consume Red and White mangrove leaves. As such, we were concerned about their potential role in die-back. We set out a caging experiment to exclude the crickets from certain dwarf Red mangrove trees to see just how much grazing they may be doing in the die-back area. This experiment is ongoing.

5. The take home: there is likely more than one causal agent of the die-back in The Marls. Many factors govern mangrove productivity and functioning: nutrient availability, salinity, sedimentation rate, herbivory, and disease are just a few of the factors that contribute to overall mangrove function making it very difficult to pin point which factors may be driving the die-off. On the bright side, we are confident that we have a lead on the causes and we are working hard in the field and laboratory to fully understand what is going on in The Marls.

By Ryann Rossi|August 26th, 2015|Disease, fungus, Insects, Mangroves and Creeks, The Marls

All pics below taken while fishing on the Marls except Melinda’s shark (I’ve never got a good one)

Hawksbill Turtle, Abaco Marls (Keith Salvesen)

Reddish Egret (White Morph), Abaco Marls

Southern Stingray, Abaco Marls (Keith Salvesen 4)

FRIENDS OF THE ENVIRONMENT has also included an article on die-back by Ryann in its latest Newsletter:

Mangrove Die Off on Abaco by Ryann Rossi, NCSU

This summer Stephanie Archer and I continued research efforts focused on determining the cause of the mangrove die-off in The Marls (work funded by the National Science Foundation). Our efforts were predominantly focused on the fungal pathogen we found associated with the die-off site. We created a small citizen science and outreach project to document the presence or absence of the pathogen across Abaco. This project consisted of short surveys and leaf collections. In total, 92 areas were surveyed including locations from Abaco and San Salvador. We also took this outreach project to the annual Bahamas Reef Environment Education Foundation (BREEF) teacher training conference. There we disseminated survey packets to teachers from islands throughout The Bahamas who will help us collect more data on the presence (or absence) of this pathogen on other Islands.

3 men on a skiff, Abaco Marls (Keith Salvesen : Rolling Harbour)

Three men on a skiff – Abaco Marls

On Abaco, we constructed an experiment to investigate the role of grazing and the presence of fungal lesions on Red mangroves. We simulated grazing using crafting scissors to cut small sections on 600 leaves in 4 different mangrove creeks. We observed the leaves for 28 days to determine if cutting leaves predisposed leaves to fungal infection. At these sites we also trapped for insects to gain an idea of what kind of grazers may be chewing on the leaves. We also did a series of disease incidence surveys that will be routinely monitored for disease progress over the next 2 years. These surveys will allow us to systematically track the progress of the disease. In addition to our field work, we spent many hours in the laboratory isolating fungi from leaves to grow in culture. These cultures were brought back to North Carolina State University and will be sequenced in order to help us identify the fungal pathogen responsible for making the lesions on the mangrove leaves.

Credits: Source material Ryann Rossi; Abaco Scientist; all photos © Keith Salvesen @ Rolling Harbour except those by Ryann / ABSCI in the main article and Melinda Riger’s cool shark

“ABACO’S GOT TALONS”: THE OSPREY

November 25, 2014 by Rolling Harbour

“ABACO’S GOT TALONS”: THE OSPREY

The magnificent Osprey Pandion haliaetus is one of the world’s most successful raptors and can be found on every continent except Antarctica.

On Abaco the Osprey is a permanent breeding resident, and while certainly not an ‘every day bird’, the chances of seeing one are reasonable. They are fairly often seen flying over the bay at Delphi, or out on the Marls. A pair recently nested at Sandy Point close to Nancy’s restaurant.

Ospreys, Abaco (Jim Todd)

There are few more exhilarating sights in the world of birds than an osprey swooping from a great height into the sea, emerging with a large fish held characteristically ‘fore and aft’ in its talons, and flying into the distance with heavy wing-beats. This wonderful close-up by wildlife photographer PHIL LANOUE shows an osprey that has actually managed to grab dinner for two…

This bird looks as if it is poised to dive onto some hapless fish Osprey in flight (Lake Wylie, S Carolina) - Gareth Rasberry

10 PANDION POINTS TO PONDER

Ospreys are also known as sea hawks, fish hawks or fish eagles. They are almost exclusively fish-eating
A mature adult’s wingspan may reach 6 feet
They are the only members of their taxonomic family, genus and species
Ospreys & owls are the only raptors with reversible outer toes to grasp prey firmly
They can carry fish weighing more than 4 lbs
They dive into water feet first to grab its prey; their nostrils can close up to keep out water
Osprey-watch.org is a global site for mapping osprey nest locations / logging nesting observations
A New Jersey group has designed the optimum artificial nest platform, now an accepted standard
Ospreys usually mate for life
Osprey populations in many areas have been affected by pesticides and by egg trophy-hunters

PUTTING THE ‘PREY’ INTO ‘OSPREY’
Osprey, Florida (Danny Sauvageau)

A utility post makes a perfect perch for a bonefish snack Osprey, Abaco (Woody Bracey) copy

CHECK OUT THE TALON…

The impressive wingspan of an Abaco osprey Osprey, Abaco (Craig Nash) copy

An osprey far out on the Marls. I managed to get some distance shots of it despite having a fishing rod in my hand… Osprey - Abaco Marls 1 Osprey - Abaco Marls 2

Osprey, by John James Audubon

The Osprey is a prolific symbol in national, cultural and sporting themes, and has been depicted on Bahamas stamps. And quite right too.

Wm Shakespeare Coriolanus

I think he [Coriolanus] will be to Rome
As is the osprey to the fish, who takes it
By sovereignty of nature…

Credits: Jim Todd (1, 3), Tom Sheley (2), Phil Lanoue (4), Gareth Rasberry / Wiki (5), Danny Sauvageau (6, 8), Woody Bracey (7), Craig Nash (9), RH (Marls pics) – thanks for all image use permissions

RAYS OF SUNSHINE ON THE ABACO MARLS

March 25, 2014 by Rolling Harbour

RAYS OF SUNSHINE ON THE ABACO MARLS

The Marls of Abaco are prime bonefishing grounds, a vast area of labyrinthine mangrove swamps, sandy islets, channels and shallow flats on the west side of the main island. The fish are wily and powerful, the fly hooks are barbless, and each one caught, retained, boated and swiftly released is a prize. There’s plenty of other wildlife to be seen. Heron and egrets, ospreys, belted kingfishers, wading birds and many other bird species make the Marls their home. In the water, there are snappers, jacks, barracuda, and sharks of various kinds and sizes. These latter range from small black tip, lemon and hammerhead sharks to more substantial contenders, with the occasional massive bull shark to add a frisson for those on a suddenly fragile-seeming skiff…

There are also rays. I have posted before about the SOUTHERN STINGRAY and the YELLOW STINGRAY. Out on the Marls I have mainly seen Southerns as they move serenely and unhurriedly through the warm shallow water. A couple of weeks ago, we were out with the rods when we had a completely new Ray experience. I’m not overly given to anthropomorphism and getting too emotional about encounters, but we all found this one quite moving – even our very experienced guide.

Gliding to our right side, a pair of stingrays slowed as they neared the skiff

The adult paused very close to us, allowing the little ray to catch up

Lifting a wing slightly the adult let the juvenile creep under, while keeping a beady eye on us

The large ray was missing the tip of its tail, presumably from some adverse encounter

The creatures examined us carefully for 2 or 3 minutes, before separating

Then they slowly drifted away across the sand…

According to our guide, this gently protective behaviour is not uncommon. They may well have been completely unrelated, the large ray tolerating the smaller one accompanying it through the waters and offering a kindly wing in the presence of danger or suspicious objects like us.

Photo Credits: Mrs RH (I was too entranced at the sharp end, with a bird’s eye view, to get a camera out)

AN OSPREY ON THE ABACO MARLS

March 12, 2014 by Rolling Harbour

AN OSPREY ON THE ABACO MARLS

Anglers are not the only creatures out fishing on the Marls. Herons and egrets of several sorts live in the massive area of mangrove swamp, shallow sea and sandy spits that make up the prime bonefishing grounds of Abaco. Yesterday, we were lucky enough to be joined by an osprey. Hooking my ‘Delphi Daddy’ safely into a rod ring, I grabbed a camera and took some shots. These aren’t that great because (a) I normally only take a small cheap camera out fishing (b) the bird was some away off and (c ) my image qualities are variable… These aren’t really worth clicking to enlarge, but I’m pleased to have got some ‘action shots’ of this wonderful bird.