Birds useful and birds harmful
Chapter IV. In the Air and on the Trees 105
Swallow, House Martin, Sand Martin, Swift, Nightjar or Fern Owl, Green Woodpecker, Greater Spotted Woodpecker, Lesser Spotted Woodpecker, Tree-Creeper, Nuthatch, Crossbill.
Birds useful and birds harmful
Swallow, House Martin, Sand Martin, Swift, Nightjar or Fern Owl, Green Woodpecker, Greater Spotted Woodpecker, Lesser Spotted Woodpecker, Tree-Creeper, Nuthatch, Crossbill.