Thursday, 25 July 2013
Thursday, 11 July 2013
The malar stripe
The malar is a stripe that runs from the lower edge of the lower mandible below the cheek and down the sides of chin and often towards the throat. It should not to be confused with the moustache which is placed higher on the face and runs from the gape of the bill or slightly above it. The malar is a common plumage feature in woodpeckers and often a key marking in separating the sexes. In those species that have a malar, the male's is often coloured whereas the females is not or is lacking. This Northern Flicker Colaptes auratus is a male as it has a classic broad black malar; the female of this species lacks the malar. Photo taken in Cuba by Gerard Gorman.
Monday, 1 July 2013
Tuesday, 4 June 2013
Monday, 20 May 2013
Thursday, 9 May 2013
Primary and Secondary Cavity Users
Most woodpeckers excavate their own holes in trees in which to breed and roost. They are 'primary cavity users'. Many other birds that cannot create such cavities, but need them as nesting sites, depend upon woodpecker holes. Such species are called 'secondary cavity users'. Here is an example: a young Tengmalm's Owl (aka Boreal Owl) looks out from a Black Woodpecker hole. In some cases the distribution and even breeding success of secondary cavity users is linked to woodpeckers. Photo by Thomas Hochebner taken in Austria.
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