So is your technique Cathy

A lot more feather detail on this fella, than your earlier uploads
Don't know how far away the twigs and branches are, but if you can get rid of the background clutter it will be a bonus

Don't be afraid to have your perch(s) as close as the lens will focus - if you are in the hide the tweets won't mind

Adrian

The main issue here John, is the light has reflected off the bark and took out some of the white breast

Also there is a tad of noise showing, which suggests a good crop, or summat similar

Not a put down, but good honest critigue

Adrian

Like the look of the angled perch, so that the bird is 90 degrees to the camera.

Due to the minimum focussing distance of the 400mm 5.6, have you thought at all, about deploying a 12 mm extension tube, to reduce it down-
Saves most of the cropping, which then saves losing detail

Adrian

A very striking mono image Angi

One minor niggle - the bra strap I presume - makes it a wee bit untidy IMHO

Adrian

Sorry Louise, but there is a lot of noise apparent in the background & the subject is a tad soft too.

When I looked at the EXIF data, I realised why.

The ISO could have been cranked well down, at the expense of a far to high shutter speed. 1/5000, when 1/500 would have sufficed. As it had a good crop also?
All IMHO of course. Perhaps others will say different

Adrian

He's a fine Robin, Len

Could have done with less on the LHS and more on the RHS though, if you get my drift

Adrian