Covering from a tennis ball becomes very useful nesting material for this coal tit!
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Do you have any other photo's as need to see head more clearly (not that I am doubting you) but there tricky little devils without this to confirm.
Sadly I haven't got any more photos - most times I spotted the tit on the tennis ball and rushed in to get my camera it decided to fly away! I will keep watching out and try and get some closer shots. Thanks for your comments.
Lat/Lng: 53.0266, -1.0227
OS grid ref: SK656481