. Oologia neerlandica : eggs of birds breeding in the Netherlands . ctyla Brehm. -Tree-Creeper. Short-clawed (Plate 37, fig. a-c).(Snouckaert: Avifauna Neerlandica, p. 29, No. 62). Colour of surface of shell;Colour of spots: Average dimensions:Average weight of shell;Texture of shell:Shape: Nest: Site of nest: Number of eggs:Breeding season:Duration of incubation: milk-white. reddish-brown, in various shades. In thezone round the thicker end of thickly spottedeggs, a few spots occur which lie deeper andare of a violet grey appearance; these con-stitute a characteristic which distinguishesthe e
. Oologia neerlandica : eggs of birds breeding in the Netherlands . ctyla Brehm. -Tree-Creeper. Short-clawed (Plate 37, fig. a-c).(Snouckaert: Avifauna Neerlandica, p. 29, No. 62). Colour of surface of shell;Colour of spots: Average dimensions:Average weight of shell;Texture of shell:Shape: Nest: Site of nest: Number of eggs:Breeding season:Duration of incubation: milk-white. reddish-brown, in various shades. In thezone round the thicker end of thickly spottedeggs, a few spots occur which lie deeper andare of a violet grey appearance; these con-stitute a characteristic which distinguishesthe eggs of this species from those ofParus cristatus mitratus. X 12 4 millimetres. gram. not specially characterized. diverse. consists of vegetable materials, feathers andmaterial spun by insects. in holes and crevices in trees, by preferencebehind the bark; behind laths and againstthatched walls, and in similar places; atheights of from about 1 to 6 Metres abovethe ground. 6-9 (after-set: 4—7). April—beginning of June. about 13 days. Fam.
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Keywords: ., bo, bookcentury1900, bookdecade1910, bookidoologianeerlandi11pelt
