Thursday 26 April 2018

A quiet week in Norfolk ... Brent Geese and summer migrants ...

Numbers of Dark-bellied Brent Geese were still impressive last week on the North Norfolk saltmarshes ...


... the birds seemed to be constantly on the move ... sometimes swimming and bathing in the channels ...


... then lifting to form great wheeling masses in the sky ...


 ... first flying westward only to return eastwards only minutes later as I stood on the edge of the saltmarsh at Morston ... they flew close by each time with no apparent avoidance of humans ...





... and yet more distant flocks towards Stiffkey ...


... along side that seemingly wintry scene Avocets were engrossed in breeding behaviour ... this group of four acting as a unit within which the pairing was perhaps not yet settled ...









... and this male fed in the nearby channel ...


Marsh Harriers were ever present ... a female settled distantly near Stiffkey Fen ...


... and Red Kites seemed much more common than in recent years ...


... a few Little Ringed Plovers were scattered around the Cley marshes along side some Dunlin and Black-tailed Godwits ...



... suddenly 19 Ruff flew in to add to the already present handfull of Ruff ...


... with some lovely looking individuals ...



... a small group of Turnstones on Blakeney Point rested on the shingle ...


... in the reed beds Bearded Tits were very scarce, perhaps the result of a hard winter ... as the week wore on increasing numbers of Sedge Warblers sang from the reeds and brambles on Blakeney fresh marsh ...

Shovelers were widely distributed with some very showy birds ...






... and Egyptian Geese strutted their stuff ...


... or at least the males did ...


... while a flock of Pochard whiled away the afternoon on an increasingly choppy stretch of water ...


... with the grebes keeping to the more sheltered areas ...



... and on a tranquil evening a smart male Gadwall drifted among the reeds as the breeze barely rippled the surface ...








Tuesday 10 April 2018

Brent Geese and a Black Brant in south Cumbria ... further insights ...

Following a number of reports of a Black Brant in the Walney Channel in Barrow I visited the area last week ... there were only about fifteen Pale-bellied Brents present so I relocated to the Roa Island causeway just about four miles to the south east ...

As the tide rose around forty Dark-bellied Brent Geese fed on the water's edge to the east of the causeway ... sometimes swimming in the shallows ... and with them, a Black Brant ...


... the appearance of the Brant puzzled me slightly in terms of some of its features ... while it was distinct from the Brents it looked rather different from the Brants that I had previously seen in Norfolk over the years ... the white neck collar seemed less bold and the white flank markings looked less intensely white and was interrupted by greyish bars ... structurally the neck was less obviously thicker than those of the Brents although the forehead was more domed ( as it should be ) in comparison with the Brents ...


... here some Brents feed together, the changing attitudes of the birds giving them ever changing colour tones in the weak sunshine ...


But alongside the Brents, the Black Brant is distinct ...



... here the head shape looks distinctive as the Brant swims behind a Brent ...


... and some video-grabs as the Brant leaves the water ...






Here is a small group of Pale-bellied Brents in the Walney Channel at Barrow ...




... and on the rising tide a flock of around eighty flew in distantly on the west side of the causeway before departing towards Walney Island ...


Still puzzled by what I took to be the atypical appearance of the Brant I checked previous images of the bird taken by others ... it was clearly the same individual ... the niggling doubt that I had was around the purity of the bird ... could it be a hybrid ? ... it strongly reminded me of Black Brant x Dark-bellied Brent hybrids that I saw in Norfolk some years ago ...

I consulted Andy Stoddart on this.

Andy writes -
The key feature to look for would be the presence of dark earth-brown hues (as opposed to grey) in the upperparts and breast ... The flanks and neck collar look to be within the range of variation of Black Brant and the breast/belly contrast looks suitably minimal so, unless the bird was strongly grey-hued, I wouldn't necessarily call it a hybrid based on your images.
Ends.

... having checked further images, the colour tones concerned showed dark brown rather than grey ... and with concerns around the neck collar and flanks allayed, thoughts of hybrid origin faded ...

... a very useful learning experience ... I'm grateful to Andy for his input ...

Interestingly a couple of taxonomic quirks came to light as I was reading around the Brent Goose complex -
- the name Brent is apparently a corruption of Brant and was introduced erroneously by Pennant in the 1800s
- Black Brant originally Branta bernicla nigricans became B.b.orientalis when it was discovered that the type specimen was not a Black Brant but a Grey-bellied Brent which thus acquired the scientific name B.b.nigricans

There have been those who advocated splitting the races of Brent Goose (including Black Brant ) into three of four species but the current IOC position keeps then as a single species.



Saturday 7 April 2018

Druridge Bay ... Water Pipit ... more summer migrants ... still some winter migrants ... the magic of Spring ...

Water Pipit is always a delight to see ... and this one showed particularly well just near the Budge Screen at Druridge Pools ...



... before flying over to one of the islands and continuing to feed voraciously ...






A group of Black-tailed Godwits roosted with Redshank on another island and one preened briefly before returning to roost-mode ...


... and distantly a party of Ruff remained largely concealed behind rushes ...

On arriving at Cresswell Pool a departing birder warned that there was 'nothing there' ... so the challenge had to be met !
... looking NE from the hide, a mixed group of gulls and waders included two lovely first-winter Mediterranean Gulls ...





Avocets were scattered around the pools and some fed in particularly deep water just north of the causeway ...



East Chevington had Long-tailed Duck still lingering along with other winter visitors in the form of Goldeneye and Pink-footed Goose ... while around ten Sand Martins hawked for insects in the relatively balmy air above ...