Walking in the frost round frozen marshes by the Exe estuary yesterday, late morning, came across a pair of very small birds in the hedgerow. Very active, so hard to get much of a fix. But olivey-green, very chiffchaff-like. Dashing from shrub to shrub, eating what I presumed were berries, but might have been insects. But what struck me about them was how often they hovered while grabbing their targets. Someone joked that they might be humming-birds! (Obvs not). I've looked it up and I see that chiffchaffs do sometimes winter in the UK. But is the hovering behaviour usual? [For chiffchaffs, read also "possibly willow warblers". I've given up on that one.] Apologies for the lack of photos - the little blighters were just too quick. Thanks.