Goldcrests

'The faint sound of a squeaky wheelbarrow sorely in need of oiling, unexpectedly drifting down from the tops or from the dark seclusion of a clump of fir trees, announces the presence of Britain's smallest bird, the goldcrest. If it were not for this squeaky note, the tiny bird would usually pass by unnoticed. Flitting energetically from branch to branch, rapidly whirring from within the cover of one tree to the haven of the next, looking like an over-size bumble bee, it urgently probes out minute insects and grubs with which to replenish its tiny body with warmth and energy.' (J. Southern, op. cit. p.48)