LIMESTONE CAVES ON ABACO: WELL WORTH LOOKING INTO…
I have written several posts in the last few months featuring Brian Kakuk’s amazing photos of the underwater caves of Abaco. These caves, mostly beneath Abaco’s pine forests, are fabulous treasures of rock and crystal. A recent post example can be seen HERE. I have also featured some of the famous Blues Holes of Abaco from time to time, for example HERE. So now it’s time to turn attention to ‘land caves’, the dry(ish) limestone holes and caverns that are dotted around Abaco, especially in the South, and bear witness to aeons of geological development through erosion.
The coppice and extensive pine forests are pitted with holes of widely varying sizes. I’m way out of my depth here, geology-wise (polite corrections invited), but this sort of landscape is I believe known as KARST. This term presumably includes Abaco’s ‘dry’ holes, the blue holes and the substantial network of underwater caverns. Small examples can readily be found in easily accessible places such as non-dense coppice. We were very surprised when we pushed our into the coppice bordering the Delphi Club guest drive and took a closer look at a hole. Although the weather was hot and dry at the time, you will see that the hole has some form of micro-climate, with damp walls and interior and wet-climate plants like small ferns and forms of what I take to be moss and algae.
ONE OF MANY LIMESTONE HOLES BESIDE THE DRIVES AT DELPHI
A HOLE NEAR HOLE-IN-THE -WALL – LARGER INSIDE THAN IT LOOKS
THE CAVE-DWELLERS OF ABACO: THE FABULOUS PARROTS
Among the best-known special residents of Abaco are the ground-nesting parrots, gorgeous birds that I have often featured in the past – see the parrot page HERE. Not so long ago, their numbers had reduced to an unsustainable population – fewer than 1000 – that faced extinction. The creation of the National Park covering the pine forests where they breed, coupled with a vigilant and intensive conservation program, have reversed the trend. There is now a sustainable breeding population again, exceeding 3000 birds.
The only other breeding Cuban parrot population in the Bahamas is found on Inagua, where they nest conventionally in trees. There is a very small non-breeding population on New Providence. Abaco’s cave-dwelling subspecies of the cuban parrot is unique. Here’s an insight into how they live, deep in the pine forest, during the summer breeding season, with many thanks to Caroline Stahala, the scientist who spent some 10 years researching and protecting the parrots.
PARROT NEST HOLES: VULNERABLE TO PREDATORS, PROTECTED FROM FOREST FIRES
PARROTS MAY NEST DEEP – OR SHALLOW.
THE BREEDING SEASON: NEST, EGGS, HATCHLINGS, FLEDGELINGS…
HOW BIG DO THE ‘DRY’ HOLES GET?
TBH my personal experience is somewhat limited. I believe there are large, sea-scoured caves along rocky parts of the south coast, but those are rather different from the eroded ground holes discussed here. As so often I rely on Mrs RH – far more intrepid than me – and her exploring skills. The cave shown below is right down at the far south of Abaco, at Hole-in-the-Wall, hidden in the coppice along the ‘Soldier Road’ from the T-junction (we are talking rough tracks here – very – not proper roads) towards the lighthouse.
The rock is far more colourful than you might expect
Credits: Caroline “The Parrot Lady” Stahala; Mrs RH for investigating the last cave and taking the camera with her; RH the rest; Woody Bracey for our great day of birding at Hole-in-the-Wall and his local knowledge of the area…