BAHAMA WARBLER: ABACO’S ENDEMIC RESIDENT

Bahama Warbler, Abaco Bahamas (Alex Hughes) 

BAHAMA WARBLER: ABACO’S ENDEMIC RESIDENT

I was looking at the list of the dozens of Abaco bird species I have featured over the years, when I was struck by the complete omission of one of Abaco’s most significant small birds – the Bahama Warbler Setophaga flavescens. This warbler species is of the most important in the Bahamas for several reasons, any one of which should have prompted me to showcase this lovely bird before now.

Bahama Warbler, Abaco Bahamas (Bruce Hallett)

A SPECIALITY BIRD

The Bahama warbler is a significant species with a near-unique status in the Bahamas:

  • Found only on Abaco and Grand Bahama
  • One of only 5 bird species endemic to the Bahamas
  • One of only 2 endemic warbler species on Abaco (with the BAHAMA YELLOWTHROAT)
  • One of only 5 permanent year-round resident warblers (33 others are migratory), the other 3 being the OLIVE-CAPPED, YELLOW, and PINE warblers.

Bahama Warbler Abaco (Woody Bracey)

Until 2011, the BAWA was classified as a subspecies of the YELLOW-THROATED WARBLER. The ornithological powers-that-be then recognised that the two species were distinct in both appearance and in vocalisation, and split them into separate species (this splitting / amalgamating process occurs annually and plays havoc with the precious ‘Life Lists’ kept with such rigour by ardent birders**.

Bahama Warbler, Abaco Bahamas (Alex Hughes)

The BAWA has such a confined range that even the extensive reach of the wonderful Cornell Lab of Ornithology has not got as far as this bird. The info sections of the otherwise comprehensive website for Neotropical Birds are blank and waiting for someone to upload some details. Here are a few facts in one of a very good series of info-graphics produced by the BAHAMAS NATIONAL TRUST.

BNT infographic Bahama Warbler

** I have never even started a Life List, which demonstrates just how lightweight I am as a bird person

Bahama Warbler, Abaco Bahamas (Tom Sheley)

Credits: Alex Hughes (1, 4); Bruce Hallett (2, 6); Woody Bracey (3); Tom Sheley (5); Range Map, Cornell; Info G, BNT

Bahama Warbler, Abaco Bahamas (Bruce Hallett)

ABACO WARBLERS: THE FIVE PERMANENT RESIDENTS

Bahama Warbler, Abaco Bahamas (Bruce Hallett)

Bahama Warbler, Abaco Bahamas (Bruce Hallett)

ABACO WARBLERS: THE FIVE PERMANENT RESIDENTS

There are 37 warbler species recorded for Abaco. They fall into three distinct categories. Surprisingly perhaps, only 5 species are permanently resident on Abaco, ie non-migratory. Then there are warblers that commute from the breeding grounds of North America to warmer climes in the Fall, returning in the Spring to breed. Some will be familiar – PALM WARBLER, AMERICAN REDSTART, BLACK-AND -WHITE WARBLER. Others, like the HOODED WARBLER, are less common. One or two are very rare indeed, such as the KIRTLAND’S WARBLERS that choose Abaco as a winter destination. Finally there are the so-called transients, warbler species that use the northern Bahamas as a stopover during their longer migratory flights, such as the BLACKPOLL WARBLER.

The 5  permanent residents don’t migrate, so there is a chance to find them year round. The pine forests will generally be the best place to start the quest. Importantly, 2 of the 5 species are endemic birds to the Bahamas and can be found nowhere else: BAHAMA YELLOWTHROAT and BAHAMA WARBLER. The latter and the OLIVE-CAPPED WARBLER, are very range-restricted, and only found on Abaco and Grand Bahama.

Yellow Warbler at sunrise.Abaco Bahamas.6.13.Tom Sheley copy copy

THE 5 PERMANENT RESIDENTS

BAHAMA YELLOWTHROAT Geothlypis rostrata PR B 1  ENDEMIC

Bahama Yellowthroat, Abaco Bahamas (Gerlinde Taurer)Bahama Yellowthroat, Abaco Bahamas (Bruce Hallett)

YELLOW WARBLER Setophaga petechia PR B 1 

Yellow Warbler, Abaco Bahamas (Tom Sheley)Yellow Warbler (f), Abaco Bahamas (Bruce Hallett)

OLIVE-CAPPED WARBLER Setophaga pityophila PR B 1 

Olive-capped Warbler, Abaco Bahamas (Tom Sheley)Olive-capped Warbler, Abaco Bahamas (Tom Sheley)

PINE WARBLER Setophaga pinus PR B 1 

Pine warbler (m) Abaco Bahamas (Bruce Hallett)

Pine warbler (m) Abaco Bahamas (Tom Reed)

BAHAMA WARBLER Setophaga flavescens PR B 1 ENDEMIC

Bahama Warbler, Abaco Bahamas - Alex HughesBahama Warbler, Abaco Bahamas - Alex Hughes

Yellow Warbler at sunrise.Abaco Bahamas.6.13.Tom Sheley copy copy

PHOTO CREDITS Bruce Hallett (1, 3, 5, 8, 11); Gerlinde Taurer (2); Tom Sheley (4, 6, 7); Tom Reed (9); Alex Hughes (10, 11)

CHECKLIST CODES based on the complete checklist and codes for Abaco devised by Tony White with Woody Bracey for “THE DELPHI CLUB GUIDE TO THE BIRDS OF ABACO” by Keith Salvesen

BLACK-THROATED BLUE WARBLERS ON ABACO

Black-throated Blue Warbler (m), Abaco (Gerlinde Taurer)

BLACK-THROATED BLUE WARBLERS ON ABACO

It’s warbler time of year on Abaco, and a good time to take a look at the Black-throated blue warbler Setophaga caerulescens. This small warbler has very particular breeding and overwintering ranges. In the summer they are found in the forests and woods of eastern North America. As the Fall approaches, they start to migrate south to the Caribbean and Central America. Abaco is one of their winter homes, as well as a likely transit stop on their way further south. Right now sightings are being reported on the mainland and the Cays.

Black-throated Blue Warbler (m), Abaco (Gerlinde Taurer)

WHAT DO I LOOK OUT FOR?

Males and females are quite different in appearance (‘sexually dimorphic’), and could even be mistaken for distinct species. Males are a deep slate-blue above (hence caerulescens) with a striking black face and throat, and white underparts. They are unmistakeable, and unlikely to be confused with any other warbler. Females are basically grayish-olive above and pale yellow underneath. For ID, look for a white stripe above the eye, a pale arc below it. In addition, both sexes have a diagnostic white patch on the the wing.

Black-throated Blue Warbler (f), Abaco (Becky Marvil)

The bird cartoon site Birdorable as usual has a spot-on comparison of the sexes

Black-throated Blue Warbler (m & f comparison) (Birdorable)

These pretty warblers can be seen in gardens, coppice, and woodland. Although mainly insect-eaters, sometimes catching them in flight, they also eat fruit and seeds especially in winter. BTBWs are territorial, and will defend their chosen space against all-comers, including their own species.

Black-throated Blue Warbler (m), Abaco (Bruce Hallett)

WHAT DO I LISTEN OUT FOR?

One source asserts: “The bird’s song can be described  as a buzzed zee-zee-zeeee with an upward inflection. Its call is a flat ctuk”. See what you think…

SONG Etienne Leroy / Xeno-Canto

CALL Paul Marvin / Xeno-Canto

                        

Black-throated Blue Warbler (m) (Blaine Rothauser CWFNJ)

Black-throated Blue Warbler (f) (Dax Roman / Birds Caribbean)

ARE BTBWs THREATENED?

BTBWs are fairly common birds within their range, with a large population. The usual stuff is happening with them in terms of habitat destruction & co at both ends of their migration. For some already threatened species (e.g. Kirtland’s Warblers), habitat degradation at either end of the migration (let alone both) presages a downward spiral in population. With BTBWs, I have read both that the population is decreasing; and in another source, slightly increasing. For now, let’s regard the welfare of the species as being stable. However, the current causes of species decline will doubtless continue, and many regard increasingly evident climate change as being a determining factor for the well-being of migratory species. The birds are not yet out of the woods, so to speak… and maybe never will be.

CREDITS Photos: Gerlinde Taurer (1, 2); Becky Marvil (3); Bruce Hallett (4); Blaine Rothauser / CWFNJ (5); @daxroman / Birds Caribbean (7); Paul Reeves / Birds Caribbean (8).  Range Map, Wiki; Cartoons,  Birdorable; Video, Cornell Lab for Ornithology

Black-throated Blue Warbler (m) (Paul Reeves / Birds Caribbean)

PALM WARBLERS

Palm Warbler, Abaco Bahamas (Bruce Hallett / Tom Sheley)

PALM WARBLERS: ‘HEADS-UP FOR BUTTERBUTTS’

I realise that the title of this post has its unattractive aspects. This is a family blog, and we try to keep references to ‘butts’ and so forth to a minimum. But like it or not, the Palm Warbler is one of two species** that have acquired the nickname ‘butterbutt’.  They weren’t even consulted; birders just went ahead with it without checking how they’d feel about it.

Palm Warbler, Abaco Bahamas (Gerlinde Taurer)

On the other hand, it’s easy to see how this minor linguistic outrage came about. It’s there for all to see, right under the bird’s… erm… stern. That flash of vivid yellow, together with the pale speckled front, a rusty brown cap and striking eye-stripe, is diagnostic for this Abaco winter resident species.

Palm Warbler, Abaco Bahamas (Nina Henry)

The ‘heads-up’ is because right now they are among you. In the gardens, on the grass, on the tracks, in the coppice, in the casuarinas. And they have an endearing habit of bobbing their… tails, let’s say, as they forage. Palm Warblers are inclined to be fairly inquisitive and tame, so if you are careful, they may stay around to let you watch them. 

Palm Warbler, Abaco Bahamas (Nina Henry)

The PW above must, I think, have been photographed at the very end of the winter season, just before it headed north from Abaco. The strong colours suggest this guy is getting into the breeding mood. Compare him with the picture below, taken by the same photographer during the same period, of a slightly less garish stage of breeding plumage. But it’s on its way…

Palm Warbler, Abaco Bahamas (Nina Henry)

As often as not, a palm warbler will be fairly easy to spot. Not always, though. You may have to work a bit to locate one half-hidden in foliage. Its posterior may not even be visible.

Palm Warbler, Abaco Bahamas (Peter Mantle)

Luckily, PWs are common enough in winter to give you a chance to shoot them in the open, as it were. Perched on a branch works just fine to capture the essential characteristics.

Palm Warbler, Abaco Bahamas (Gerlinde Taurer)

Keep an eye out for these pretty little warblers. They are enjoyable to watch, and relatively easy to get a photo of at close quarters. Just make sure you get the butterbutt into the picture.

** The other butterbutt bird is the descriptively-named YELLOW-RUMPED WARBLER, though its buttery bits are on the topside so there’s no risk of confusion (I photographed this one as a distance shot at the top of a tree with a small camera – but it captures the essentials!)

Yellow-rumped Warbler, Abaco, Bahamas (Keith Salvesen)

Credits: Bruce Hallett (1)*; Gerlinde Taurer (2, 7); Nina Henry (3, 4, 5); Peter Mantle (6); Keith Salvesen (8, 9)

* Possibly Tom Sheley – all I have got on the filename is ‘Fruit Farm’ so I can’t be sure of the photographer’s ID – apologies

 Palm Warbler, Abaco Bahamas (Keith Salvesen)

YELLOW-THROATED WARBLERS ON ABACO

Yellow-throated warbler, Abaco (Keith Salvesen)

YELLOW-THROATED WARBLERS ON ABACO

The Yellow-throated Warbler (Setophaga dominica) is a most helpful warbler, in that what you see is what you get. You needn’t go to embarrassing lengths to determine whether it has a Yellow Rump. It doesn’t make extravagant geographical claims like the Cape May, Kentucky, Tennessee, Nashville or Connecticut warblers. It doesn’t disguise its warblerdom with a confusing name like ‘American Redstart’ or ‘Ovenbird’. Nor with a weird warbler name that is completely obscure like the Prothonotary. It’s a winter resident only, so it won’t try to puzzle you in the summer. The males and females are roughly similar in appearance, unlike so many species. All-in-all, a most agreeable and obliging little bird. Here are a few to enjoy, before I spoil the magic slightly…

Yellow-throated Warbler, Abaco (Bruce Hallett)Yellow-throated Warbler, Abaco (Bruce Hallett) 2Yellow-throated warbler, Abaco (Erik Gauger)Yellow-throated Warbler, Abaco (Becky Marvil) Yellow-throated Warbler, Abaco - Becky MarvilYellow-throated warbler, Abaco (Keith Salvesen)

Yellow-throated warbler, Abaco (Keith Salvesen)

Yellow-throated warbler, Abaco (Keith Salvesen)Yellow-throated warbler, Abaco (Keith Salvesen)

I said earlier that the magic of the apparently simple ID of a warbler that lives up to its name would have to be spoiled. I’m afraid the images below rather undo the certainties I’d promised… two more species common to Abaco, also named for their yellow throats (though note: the yellow extends to more than just the throat) . 
BAHAMA YELLOWTHROAT20130106_Bahamas-Great Abaco_4846_Bahama Yellowthroat_Gerlinde Taurer copy
COMMON YELLOWTHROAT
800px-Common_Yellowthroat_by_Dan_Pancamo
You’d really think that someone at Audubon Towers or Cornell Castle might have thought of calling these two species ‘Bahama’ and ‘Common’ Masked Warblers, wouldn’t you – after all there’s a Hooded Warbler, which indeed has a hood. No other warbler has a mask like these two. Then any confusion could be avoided.
Credits: Keith Salvesen (1,7,8,9,10); Bruce Hallett (2, 3); Erik Gauger (4); Becky Marvil (5, 6). Thumbnails: Gerlinde Taurer, Dan Pancamo