When it comes to achieving good portraits of Barn Owls in the wild,Two things tend to stand in your way. The early morning and late evening restricted light availability being a nightmare for good exposure being the first. And secondly the fact that you are dealing with a subject with acute senses of both sound and vision, The use of long lenses, camo gear and good field skills seems to be called for here but camouflaged clothing is a bit like ivy and tends to grow all over anything that does not move,
Judging by the images below I might have been sat in this hedgerow a tad to long....
But if this is what you have to do to create close portraits without disturbing your subject then so be it, I have posted some results from the last few days below along with some details of the setting required to achieve reasonable exposures in the prevailing conditions.
17.40Pm F4 ISO 5600 1/1250sec on Nikon 500mm lens,
Detail as the above image
17.16PM F4 1/1250sec ISO3200 Nikon 500mm lens
Details as above image
17.15 Pm F4 1/1250sec ISO 1400 Nikon 500mm lens
06.53AM F4 1/2000sec ISO6400 Nikon 500mm lens
Details as above image