PLOVER APPRECIATION DAY 2018: ABACO’S 6 TREASURES


Wilson's Plover Chick, Abaco, Bahamas (Tom Sheley)

PLOVER APPRECIATION DAY 2018: ABACO’S 6 TREASURES

Every day of the year, or so it seems, at least one worthy creature has been awarded an ‘Appreciation Day’, a special day when a particular species has its profile raised and awareness spread around. It certainly seems to be the case with birds; I’m going to assume that it applies to all the other classes of animal – mammals, fish, reptiles, amphibians and invertebrates, each with their own worthy candidates for recognition. Except for no-see-ums, obviously. And fire ants, I hope. You’d think standing on a nest while taking photos just once in a lifetime would be a lesson. I’ve done it twice… Anyway, yesterday was Plover Appreciation Day 2018.

PLOVERS ON ABACO

Until recently Abaco had 33 recorded shorebird species but since the first-ever sightings of a BUFF-BREASTED SANDPIPER in 2016, the number has risen to 34. Of these, a mere 6 are plovers: 

  • Black-bellied Plover                        Pluvialis squatarola                      WR 1
  • American Golden Plover                 Pluvialis dominica                         TR 4
  • Wilson’s Plover                                Ochthodromus wilsonia             PR B 2
  • Semipalmated Plover                     Charadrius semipalmatus            WR 2
  • Piping Plover                                    Charadrius melodus                     WR 3
  • Killdeer                                              Charadrius vociferus                    WR 2

The codes tell you, for any particular bird, when you may see it (P = permanent, WR = winter resident, TR = transient); whether it breeds (B) on Abaco; and your chance of seeing it, graded from easy (1) to vanishingly unlikely (5)

The best-known of the 6 Abaco plover species is the Wilson’s Plover, because it is the only permanent resident. The American Golden Plover is a rare transient, but we luckily have a photo of one (below) taken on Abaco. All the others are winter residents and easy to middling hard to find.

The Piping Plover is the most interesting species, with a mere 8000 left in the world. There is a vigorous conservation program to protect them and their habitat, both in their breeding grounds in the North and their southern overwintering grounds. Their summer breeding range is in Canada and the Great Lakes, north-central US, and the eastern seaboard. In winter they migrate south, many to the Bahamas – and Abaco is one of their preferred homes. We count as many as we can between August and February, report the banded ones, and find out their origins and histories

BLACK-BELLIED PLOVER  Pluvialis squatarola   WR 1

Non-breeding plumage (as you would see normally it on Abaco, without the black belly)Black-bellied Plover intermediate plumage. Marls. Abaco Bahamas. Tom Sheley

 Breeding plumage – and the reason for the nameBlack-bellied Plover (breeding plumage), Bahamas (Linda Barry-Cooper)

AMERICAN GOLDEN PLOVER  Pluvialis dominica  TR 4

American Golden Plover, Bahamas (Tony Hepburn)

 SEMIPALMATED PLOVER Charadrius semipalmatus WR 2

Semi-palmated Plover, Bahamas (Tony Hepburn)Semipalmated Plover (f nb), Abaco - Bruce Hallett

KILLDEER Charadrius vociferus WR 2

Kildeer, Abaco - Bruce Hallett

PIPING PLOVER  Charadrius melodus WR 3

Piping Plover, Bahamas (Tony Hepburn)Piping Plover, Abaco Bahamas (Peter Mantle)Piping Plover, Abaco Bahamas (Keith Salvesen)

WILSON’S PLOVER Ochthodromus wilsonia  PR B 2

This permanent resident plover is a year-round presence on the Delphi Club beach, where in summer they nest and raise their tiny fluffball chicks. They are especially significant on Abaco as the only breeding plover species – it’s the only chance we get to see plover nests and chicks… (see header image and below).

Wilson's Plover, Delphi Club Beach, Abaco - Craig NashWilson's Plover, Abaco 12

RELATED POSTS

PIPING PLOVERS

50 WAYS TO PLEASE YOUR PLOVER

WILSON’S PLOVERS (1) ‘Dream Plover’

 WILSON’S PLOVERS (2) Nest Protection

 WILSON’S PLOVERS (3) Scrapes, Chicks & Broken Wings

SEMI-PALMATED PLOVERS

Photo credits: Tom Sheley (1, 2); Linda Barry-Cooper (3); Tony Hepburn (4, 5, 8); Bruce Hallett (6, 7); Peter Mantle (9); Keith Salvesen (10, 13); Sandy Walker (11); Craig Nash (12); Charmaine Albury (14)

Piping Plover, Abaco Bahamas (Charmaine Albury)

LOGGERHEAD KINGBIRD: BENIGN ‘TYRANT’ OF ABACO


Loggerhead Kingbird, Abaco Bahamas (Keith Salvesen)

LOGGERHEAD KINGBIRD: BENIGN ‘TYRANT’ OF ABACO

Abaco is home to 4 main so-called tyrant flycatchers (Tyrannidae): the loggerhead kingbird, the gray kingbird, the La Sagra’s flycatcher and the Cuban pewee. All are common permanent residents except the gray kingbird, which is a summer resident only. Several other flycatcher species are found on Abaco, but they are very uncommon winter residents, rare transients, or vagrants.

Loggerhead Kingbird, Abaco Bahamas (Keith Salvesen)

The loggerhead featured here in several poses is a watchful sentinel at Delphi. His preferred perches are in the edge of the coppice round the pool or at the edge of the main drive. From time to time he will leave his perch to catch a passing insect by ‘hawking’, returning to the same place to eat it.

Loggerhead Kingbird, Abaco Bahamas (Keith Salvesen)

Loggerhead and gray kingbirds can be quite easy to confuse. A couple of years ago I wrote about how to distinguish them, and with gray kingbirds in residence now this is probably a good time to set out the distinctions again.

Loggerhead Kingbird, Abaco Bahamas (Keith Salvesen)

LOGGERHEAD Tyrannus caudifasciatus vs GRAY Tyrannus dominicensis 

DIFFERENCES and SIMILARITIES

TOP TIP ANY KINGBIRD SEEN IN WINTER WILL BE A LOGGERHEAD

  • Kingbirds seen between (say) October & March are Loggerheads. Grays are strictly summer visitors
  • Both are medium size birds and roughly the same size as adults (around 23 cms)
  • Loggerheads have dark brown to near-black heads, grays have lighter, slate-coloured heads
  • Loggerheads have a ‘squared’ tip to the tail; grays have a notched tip
  • Loggerheads may have a whitish fringe at the tip of the tail; grays not so
  • Loggerheads have yellowish tinges to their white undersides & forewings; grays less so or not at all
  • Grays have a dark or black ‘mask’ through the eyes, often clear but not always easy to see
  • Loggerheads allegedly have inconspicuous orange head crests; grays are red. I’ve never seen either!
  • [*RH personal opinion alert*] Grays have larger, heavier beaks than loggerheads
  • Grays are territorially aggressive; when they turn up, the loggerheads tend to retreat to the forest

Loggerhead Kingbird, Abaco Bahamas (Keith Salvesen)

Here is how David Sibley shows the differences

 6323_Sibl_9780307957900_art_r1 3069_Sibl_9780307957900_art_r1-1

Illustrations: David Allen Sibley

GRAY KINGBIRD FOR COMPARISONGray_Kingbird (Dick Daniels Wiki)

MEMORABLE FACT TO DEPLOY IN CONVERSATION

The collective names for a group of kingbirds are: a Court, a Coronation, or a Tyranny

Loggerhead Kingbird, Abaco Bahamas (Keith Salvesen)

Photo Credits: All loggerheads, Keith Salvesen at Delphi;  gray kingbird by Dick Daniels; Illustrations David Sibley

SEA BISCUITS: THEY REALLY DO CONTAIN DOVES – AND MORE!


Sea Biscuit Close-up, Abaco (Keith Salvesen)

SEA BISCUITS: THEY REALLY DO CONTAIN DOVES – AND MORE!

Recently I posed the question whether sea biscuits, like sand dollars contain ‘doves’. I had one in my hand, it rattled, I took a photograph through its ‘mouth hole’ and the question was answered. Biscuits do indeed contain doves – see HERE for details and comparisons with dollar doves.

Sea Biscuit 'Doves', Abaco (Keith Salvesen)

However, I spinelessly* failed to break open the biscuit to check out the contents more closely. I theorised that, because of the 5-way symmetry of these creatures, there would be 5 doves (which are in fact segmented mouth parts) in a biscuit exactly as with a dollar, and amiably challenged anyone to disprove it. [* biscuits and dollars are types of sea urchin – see what I did there?]

Dollar dove in close-up – one of 5 segmented mouth parts inside the ‘test’ (skeleton)Sand Dollar 'Doves', Abaco (Keith Salvesen)

Melissa Ann Guinness from Hope Town has a far more robust attitude to these things and, taking up the challenge, she heartlessly smashed open a sea biscuit from her collection to investigate further. I said I’d publish a correction if my theory was wrong. This is it – though in one arguable sense the theory holds good. It just didn’t go far enough…

Sea Biscuit 'Doves', Abaco (Melissa Ann Guinness)

In the above picture you can see (a) 4 quarters of a sea biscuit skeleton (b) 10 demi-doves (rather than 5 whole doves) and (c) a small mummified 5-limbed brittle star that was presumably in the creature’s digestive system when it died.

10 ‘demi-doves’  (or, when assembled, 5 doves that (unlike sand dollars) are in 2 parts
Sea Biscuit 'Doves', Abaco (Melissa Ann Guinness)

Complete doves

Sea Biscuit 'Doves', Abaco (Melissa Ann Guinness) Sea Biscuit 'Doves', Abaco (Melissa Ann Guinness) Sea Biscuit 'Doves', Abaco (Melissa Ann Guinness)

The final reconstruction – 5 doves and a bonus brittle star

Sea Biscuit 'Doves', Abaco (Keith Salvesen)

Photo Credits: Keith Salvesen (1, 2, 3, 10); Melissa Ann Guinness (4, 5, 6, ,7 ,8 ,9)

THICK-BILLED VIREOS ON ABACO: “NIDIFICATION”


Thick-billed Vireo nesting - Delphi, Abaco (Keith Salvesen)

THICK-BILLED VIREOS ON ABACO: “NIDIFICATION”

“Nidification” was one of the new words I learned from the wonderful book Birds of the West Indies by James Bond (a different one – for the full story behind the name click HERE). It means, essentially, the nesting process of a bird. It sounds pleasingly technical for a straightforward concept: nest-building.

Soft furnishings being addedThick-billed Vireo nesting - Delphi, Abaco (Keith Salvesen)

I spotted this TBV making its nest on the edge of the drive at Delphi. I usually think of these cheerful chirpy birds as ‘lurkers’, hanging back in the coppice and not making themselves easily visible. But this nest was right out in the open – possibly not the wisest place for nidification.

Thick-billed Vireo nesting - Delphi, Abaco (Keith Salvesen)

If you look up TBV’s in bird books, you may find a reference to nest building in the fork of shrubs or bushes – exactly what was going on here. It quite a messy nest, but then again it looks comfortable and firmly wedged in.

Thick-billed Vireo nesting - Delphi, Abaco (Keith Salvesen)

Although I only saw one of the pair actively engaged in the building, another TBV was ‘vocalising’ (there’s another technical term, = singing) nearby, presumably the mate. In a way that humans have been slow to adopt, both birds will be actively involved in raising their family, from incubating the eggs to chick care – feeding, cleaning out the nest and so on. 

WHAT DO THEY SOUND LIKE WHEN THEY VOCALISE?

Let’s hope for a successful outcome to the nidification…

Thick-billed Vireo nesting - Delphi, Abaco (Keith Salvesen)

All photos Keith Salvesen, also the sound recording (made at Delphi)

SEA BISCUITS: DO THEY REALLY CONTAIN DOVES?


Sea Biscuits, Delphi, Abaco (Clare Latimer)

Sea Biscuits on the Beach, Delphi, Abaco Bahamas

SEA BISCUITS: DO THEY REALLY CONTAIN DOVES?

A couple of years ago I wrote a post called ECHINODERMS, DOLLAR DOVES & PETRIFIED BISCUITS. It dealt with the… fact? rumour? old wive’s tale?… that within each sand dollar test (i.e. the white skeleton) are hidden 5 ‘doves’. You can hear them rattling inside if you shake the dollar… 

Sand Dollar Doves (Keith Salvesen) 6

Sand Dollar from Abaco containing 5 miniature white doves…

I investigated the theory with senior granddaughter, and we broke a sand dollar in half. And as you can see, the answer was undoubtedly yes – there were 5 tiny white doves, thus fulfilling the prediction of the famous ‘Sand Dollar’ poem that contains the lines  “Now break the centre open And here you will release The five white doves awaiting To spread good will and peace”.

Five white doves (in fact, the separated parts of the creature’s feeding apparatus)Sand Dollar Doves (Keith Salvesen) 1

A single dove, a picture of dovelinessSand Dollar Doves (Keith Salvesen) 3

I never thought to extend the experiment to sea biscuits, another object prized by beachcombers. All that changed last month when I picked up a sea biscuit and found that it, too, rattled.

A rattling good sea biscuit

So I turned it over to take a closer look at the underside. And there, unmistakably, was the source of the rattle – some kind of internal arrangement inside the feeding  hole (let us not pause overlong to consider the purpose of the other hole). But it wasn’t conclusively a dove.

So I shook it around a bit (sorry, doves) and zoomed in. And there was a small white columbine-type contraption remarkably similar to those found in the dollar dove. And no, I did not smash open the sea biscuit (it wasn’t actually mine). And no, I didn’t doubt any longer that sea biscuits also contain doves.

SO WILL THERE BE 5 DOVES, LIKE WITH THE DOLLARS?

I predict there will also be five. Both dollars and biscuits have ‘five-way symmetry’ (look on the topside of a biscuit or dollar to see how); and so the mouth (from which the ‘doves’ derive) will have a single part for each of the five sectors, all linked. 

If anyone would like to smash up one of their precious beach finds and test the theory, please feel free. Prove me wrong… and I’ll publish a correction! [Photo please…]

All photos Keith Salvesen except Header, Clare Latimer at Delphi

BUTTERFLIES ON ABACO (10) : HAMMOCK SKIPPER


Hammock Skipper - Polygonus leo, Abaco Bahamas (©Keith Salvesen)

BUTTERFLIES ON ABACO (10)

HAMMOCK SKIPPER

The Hammock Skipper Polygonus leo is quite a small butterfly. We found the ones shown here in the vegetation at the back of the Delphi beach. Having initially thought this was a Northern Cloudywing (and a ‘lifer’ for me), Colin Redfern has kindly corrected my (mis-)ID, and I have made the consequent changes.

Hammock Skipper - Polygonus leo, Abaco Bahamas (©Keith Salvesen)

Perhaps unusually for butterflies these skippers are sexually ‘monomorphic’, i.e. very similar in both sexes. Males and females both have completely dark brown wings except for the small white spots.

Hammock Skipper - Polygonus leo, Abaco Bahamas (©Keith Salvesen)

We noticed that the spots and patterns were (again, unusually?) not symmetrical as between the wings. [That should probably be ‘not reflectively symmetrical’, as with a Rorschach inkblot.]

 

Hammock Skipper - Polygonus leo, Abaco Bahamas (©Keith Salvesen)

All photos, Keith Salvesen; timely ID correction courtesy of Colin Redfern…

ABACO CHECKLIST: 40 BIRDS IN A DAY


Painted Bunting, Abaco Bahamas (Tom Sheley)

ABACO CHECKLIST: 40 BIRDS IN A DAY

South Abaco – the whole area south of Marsh Harbour – provides by far the best birding opportunities for a day of varied birding. A recent party led by birding guide Reginald Patterson included Charmaine Albury in the enthusiastic team. She sent me their checklist for the day – 40 species covering an impressive range of bird types. Here is the list, to which I have added some illustrative photographs.

Abaco (Cuban) Parrot (Keith Salvesen)

BAHAMA PALM SHORES

1. Blackfaced Grassquit
2. Greater Antillean Bullfinch
3. Red-winged Blackbird
4. Gray Catbird
5. Abaco (Cuban) Parrots
6. Painted Bunting
7. Northern Mockingbird
8. La Sagra’s Flycatcher
9. Cuban Pewee
10. Yellow-throated Warbler

Western Spindalis, Abaco (Craig Nash)

11. Western Spindalis
12. West Indian Woodpecker
13. Cape May Warbler
14. Ovenbird
15. Eurasian Collared Dove
16. Common Ground Dove
17. Bananaquit
18. Red-legged Thrush
19. Turkey Vulture
20. Cuban Emerald Hummingbird
21. Thick-billed Vireo

Thick-billed Vireo, Abaco (Gerlinde Taurer)

BPS Duck Pond

22. Blue-winged Teal
23. Green-winged Teal
24. Common Gallinule

Common Gallinule, Abaco (Keith Salvesen)

SAWMILL SINK BLUE HOLE

25. Olive-capped Warbler
26. Yellow-rumped Warbler
27. Loggerhead Kingbird
28. Prairie Warbler

Prairie Warbler, Abaco (Gerlinde Taurer)

HIGHWAY ROADSIDE

29. Bahama Warbler
30. American Kestrel

American Kestrel, Abaco (Tom Reed)

GILPIN POND

31. White-cheeked (Bahama) Pintail
32. Great Egret
33. Great Blue Heron
34. Tricolored Heron
35. Lesser Yellowlegs
36. Solitary Sandpiper

White-cheeked (Bahama) Pintail, Abaco (Keith Salvesen)

SANDY POINT

37. Laughing gulls
38. Ruddy turnstone
39. Sanderlings
40. Royal terns

Sanderlings, Abaco (Keith Salvesen)

The checklist covers a broad range of birds that you might expect to see in habitats ranging from coppice to pine forest to water to shoreline. Most are permanent residents, with some winter residents (eg the painted bunting, Cape May warbler). Abaco specialities include the parrots of course, the West-Indian woodpecker and the olive-capped warbler.

And birds that might, on another day, be seen? Maybe the endemic Bahama Woodstar hummingbird and the endemic Bahama Swallow. At Gilpin Pond, black-necked stilts and perhaps a belted kingfisher. And at Sandy Point, brown pelicans fishing off the dock and the chance of white-tailed tropicbirds off-shore. But overall a ’40 day’ is a great day!

Great Egret, Abaco Bahamas (Nina Henry)

We are just back on Abaco last night, and without actually trying – and just from the balcony in about 20 minutes – we have scooped:

Turkey Vulture, Black-faced Grassquit, Bananaquit, Bahama Swallows, Loggerhead Kingbird, La Sagra’s Flycatcher, and Thick-billed Vireo – also Oystercatchers heard from the beach. Time to investigate further…

Credits: Tom Sheley (1); Keith Salvesen (2, 5, 8, 9); Craig Nash (3); Gerlinde Taurer (4, 6); Tom Reed (7); Nina Henry (10)