Pheasant (Common Pheasant or Ring-necked Pheasant) Phasianus colchicus
A super-abundant species whose population is maintained at an artificially high level thanks to vast numbers of birds being reared and released by gamekeepers. There are a number of different races of this non-native species but due to a long history of interbreeding between them it is not normally possible to assign individuals to one or other race. Most show a conspicuous white neck ring but a large number lack this or show only a partial ring. Melanistic birds resembling Japanese Green Pheasants are being released in increasing numbers - scroll down for more information and photos of these.
'Melanistic' Pheasants
Recent years have seen a sharp increase in very dark Pheasants being released into the Norfolk countryside and in one or two areas they may even outnumber ordinary Pheasants. I presume that it is these birds that have led to a simultaneous spate of reports of Japanese Green Pheasants Phasianus versicolor, however despite their superficial similarity, this identification is not correct.
These birds are not simply blackish Pheasants as might be expected of melanistic birds, but according to variations in light conditions they may appear green, purple or blue (or black). The term "melanistic" is frequently applied to these birds, although I'm not sure if it's technically correct to describe this irridescent plumage as melanism. Although there is possibly some Japanese Green Pheasant influence in their ancestry (but I suspect not), these intriguing birds are best referred to as a variation, or mutation, of (Common) Pheasant. The variation is known as 'tenebrosus'.
The population of Pheasants in the Great Hockham and Wretham area of the Brecks appears to contain a particularly large proportion of these birds but they can frequently be encountered anywhere in Norfolk and beyond. However they seem a little harder to find again in very recent years, so I wonder if they were a passing fad for gamekeepers?
|
|
|
|
male Pheasant (var. tenebrosus), Great Hockham (Norfolk, UK), 12th March 2006
|
|
|
|
|
|
male Pheasant (var. tenebrosus), Wretham (Norfolk, UK), 20th March 2005
|
male Pheasant (var. tenebrosus), Ingoldisthorpe (Norfolk, UK), 27th January 2005
|
|
|
|
|
female Pheasant (var. tenebrosus), Great Hockham (Norfolk, UK), 20th March 2005
|
|
|
|
|
|
presumed immature male Pheasant (var. tenebrosus), Swanton Morley (Norfolk, UK), 18th October 2008
|
presumed immature male Pheasant (var. tenebrosus), Thornham Corner (Norfolk, UK), 27th November 2004
|
|
|
|
|
male Pheasant (var. tenebrosus), Great Hockham (Norfolk, UK), 14th February 2009
|
|
|
|
|
|
female Pheasant sp., (perhaps var. tenebrosus)?, between Amner & West Newton (Norfolk, UK), 20th February 2009 - really not sure about this one: blue skin round the eye and excessively prominent pale fringes all over otherwise dark plumage. Not your typical tenebrosus but what does look like this? Let me know if you have any thoughts on this one! |
|
Unsurprisingly, these variant Pheasants interbreed with ordinary Pheasants and a variety of intermediate plumages can often be encountered. Some of the darker birds in the following batch of photos may possibly be birds with the tenebrosus mutant in their ancestry:
|
|
|
|
male Pheasant, Sandringham (Norfolk, UK), 24th January 2005
|
|
|
|
|
|
|
male Pheasant, Holkham (Norfolk, UK), 23rd February 2004
|
||
|
|
|
|
male Pheasant, south of Brancaster (Norfolk, UK), 9th November 2005
|
male Pheasant, Sandringham (Norfolk, UK), 19th January 2009
|

.jpg)
.jpg)