AMONG the birds that come under Mr.
Massingham's close scrutiny this evening are the Tree-creeper that is so like the bark on which it searches for food that to the untrained eye it is invisible ; the gay little Nuthatch, sturdy and bright, that is such a ready visitor to the nut trees ; the elfin Wood-wren ; the brilliant and amorous Bullfinch ; the Long-tailed Tit that lives in flocks and haunts the wood edge, and the Woodpecker whose hammer-beat is like the pulse of the green wood where he lives. This is the fourth talk in Mr. Massingham's series, in which this well-known writer on Natural History is telling his own persona! impression of birds in their natural settings.