I have Jethro and Amber on the middle (between top and bottom) of my kitchen window-sill - they get lit beautifully there, all day long.
I got one for my wee brother's birthday and one for me - then couldn't bear to part with one. I've promised him one for his yuletide.
(I got him a Rachel Elliot cast Garden shed too, also from the Queen's Gallery, then couldn't bear to part with it.)
These birdies really are rather special - the glass is melted together very, very nicely - I imagine she uses higher temperatures than for normal slumping and fusing.