THICK-BILLED VIREOS: ABACO’S ONLY PERMANENT RESIDENT VIREO


Thick-billed Vireo, Abaco 2 Tom Reed

THICK-BILLED VIREOS: ABACO’S ONLY PERMANENT RESIDENT VIREO

Hard to know why I haven’t got round to featuring these little vireos before. Unlike the other 7 vireo species found on Abaco seasonally or as transients, the Thick-billed Vireo Vireo crassirostris is an ever-present permanent resident of the coppice and scrub; and their unmistakeable repeating song can be heard almost everywhere. It was the first bird song I heard on Abaco, and therefore the TBV was the first bird I learned to ID. I’ve got quite a soft spot for them, really.Thick-billed Vireo, Abaco (Craig Nash)

Although TBVs are very easy to hear and track to a general area of coppice, I find actually seeing the bird creating the noise quite hard – let alone getting a clear camera shot. They always seem to be lurking several feet further away, deeper in the foliage, than the sound suggests. I’ve had some fun making TBV song iPhone recordings along the Delphi drive, practising the technique. If you want to know more about recording and converting to MP3 CLICK HERE.

One of my favourite images, from Gerlinde Taurer: a ‘shouty’ bird. We used it for ‘BIRDS OF ABACO‘.Thick-billed Vireo, Abaco  (Gerlinde Taurer 2)

I also love this perky little guy with a great beady-eyed pose taken by Bruce HallettThick-billed Vireo, Abaco (Bruce Hallett 2)

Here’s a clip of song, which I’m sure will be immediately familiar to Bahamians:

Paul Driver / Xeno Canto

Thick-billed Vireo, Abaco Bahamas.Tom Sheley

The main signifiers for this species, which in combination distinguish the TBV from the other vireo species on Abaco, are:

  • Two white wing bars
  • Yellow patch – usually quite prominent – between eye and beak
  • Thick bill – which immediately rules it out of being one of the 37 warbler species on Abaco…

Text book TBVThick-billed Vireo, Abaco (Becky Marvil 2).jpg

There are marked colour variations in the species according to maturity, season and to an extent gender (though m & f are quite similar). Here’s one that is causing wing-bar confusion by only showing traces. It also has quite dark upper parts.

Thick-billed Vireo, Abaco (Alex Hughes)

This is a very yellow TBVThick-billed Vireo, Abaco (Bruce Hallett 1)Whereas this one has rather anaemic colorationThick-billed Vireo, Abaco Bahamas .Tom SheleyFinally, this pretty TBV is very delicately markedThick-billed Vireo, Abaco (Tony Hepburn)

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Credits: Tom Reed (1), Craig Nash (2), Gerlinde Taurer (3), Bruce Hallett (4, 8), Tom Sheley (5, 9), Becky Marvil (6), Alex Hughes (7), Tony Hepburn (10); Paul Driver / Xeno Canto

VIREOS ON ABACO (1): GOING CHEEP – THE BLACK-WHISKERED VIREO


Black-whiskered Vireo, Abaco (Bruce Hallett)

GOING CHEEP ON ABACO: THE BLACK-WHISKERED VIREO

There are 8 vireo species recorded for Abaco. The most common is the ubiquitous Thick-billed Vireo Vireo crassirostris – the only permanent resident vireo – whose cheery chirp is part of the background of bird song heard daily all over the island.  The only other species you are likely to encounter without going out of your way is the summer resident BLACK-WHISKERED VIREO Vireo altiloquus, which breeds on Abaco. The other 6 are the White-eyed, Yellow-throated, Blue-headed, Warbling, Philadelphia, and Red-eyed Vireo. Of these, the first 2 are quite rare winter residents; and the other 4 are considered to be transients. Black-whiskered Vireo, Abaco

The BWV’s song is similar to the Thick-billed Vireo, but (luckily) identifiably different. I’m not a great one for phonetic attempts at turning a bird call into a human sentence of the ‘Quick!-come-to-pick-up-a-brick’ and the ‘Skin-me-a-nice-bit-of-bonefish’ type. The Black-whiskered Vireo’s song has been described as sounding like ‘Whip, Tom Kelly’. But not to me. See what you make of it…

Brian Cox / Xeno-Canto

Black-whiskered Vireo, Abaco Bahamas 2 (Tom Sheley)

As with other vireo species, the BWV has a stout bill, a feature that helps to distinguish vireos from the many thin-billed warbler species on Abaco. The main signifiers are found on this bird’s head: the dark stripe right through the eye; the long white eyebrows; and the noticeable black lines – the ‘whiskers’ – on the sides of the neck. Other identification pointers are the pale underside with a yellow tinge to the flanks and undertail; and the red eyes (the red-eyed vireo, a very similar bird, lacks the whiskers).Black-whiskered Vireo, Abaco (Charmaine Albury)

Black-whiskered vireos feed mostly on insects in trees, bushes and undergrowth. They can sometimes be seen hovering while they forage. They also vary their diet with small quantities of berries. Here are two great shots of a mother BWV feeding a very large chick with a berry, followed by some vile insect.Black-whiskered Vireo, Abaco (Charlie Skinner)Black-whiskered Vireo, Abaco (Charlie Skinner)

Image Credits: Bruce Hallett, Tom Shelley, Charlie Skinner, Charmaine Albury, Erik Gaugerblack-whiskered-vireo, Abaco (Erik Gauger) 1