THE ‘THRUSH’ THAT ISN’T: NORTHERN WATERTHRUSH ON ABACO

The pretty thrush-like warbler Northern Waterthrush Parkesia noveboracensis is a common winter resident on Abaco. Despite the name it’s not a real thrush, but it is larger than most of the compact winter warblers that heed the the migratory instinct that “It’s Better in the Bahamas” and make Abaco their overwintering habitat.

HOW CAN YOU TELL SIMILAR PLUMAGED THRUSHES FROM THESE GUYS?

The simplest rule of thumb is that true thrushes have spotted or speckled chests; whereas waterthrushes have streaked chests. That, and the fact that similar thrush species are generally larger. A number of true thrushes are recorded for Abaco, many quite similar to the waterthrush; but the speckled vs spotted distinction should be your guide. If a sighting is momentary or in bad light, it’s anyone’s guess…

APART FROM THRUSHES, ANY OTHER BIRDS I MIGHT CONFUSE IT WITH?

There’s another far less commonly found waterthrush that also overwinters on Abaco – the closely-related Louisiana waterthrush Parkesia motacilla. I have no Abaco photos of one – it really is quite rare – so I’ve had to borrow an open source one. The Cornell Lab explains the differences between the two waterthrushes thus: “Northern usually has stripes on throat, a slightly smaller bill, a thinner and off-white or cream eyestripe that does not extend as far onto the nape, less pink legs, and a more yellowish wash on the underparts”. Maybe one can generalise that the northern is overall a yellower bird, and its legs are more brown than pink.

Lousiana waterthrush – rarer on Abaco than the northern but a potential source of confusion

WHAT’S THAT POSH TAXONOMIC NAME ALL ABOUT, THEN?

The Mr Parkes in question was Kenneth Carroll Parkes (1922 – 2007), an American ornithologist and Chief Curator at the Carnegie Museum of Natural History, Pittsburgh. The noveboracencis part simply means ‘from New York’ in Latin (novum – new; Eboracum – York); and the -ensis is a common suffix meaning ‘from’. Mr Parkes’s bird from New York.

Kenneth Carrol Parkes

Credits: Tom Sheley (1, 2, 8); Becky Marvil (3); Magnus Manske (4); Bruce Hallett (5); Gerlinde Taurer (6, 7); Richard E Webster at Xeno-Canto for the song clip