Please do bear in mind that if you are attempting to photograph Kingfishers, they are (or at least were, the last time I looked) a
SCHEDULE 1 SPECIES.
This means if you are photographing them at or indeed "near" their nest (even accidentally), without a licence you are breaking the law.
NB.
"Near" varies amongst different sch1 species - but please, please do make sure you are nowhere NEAR any Kingfisher nest, with your camera, hidden, camouflaged, accidentally or not...
TBR