. Oologia neerlandica : eggs of birds breeding in the Netherlands . mate-rial. (Breeds in colonies). generally 3. May—June. about 18 days. Mr. J AC. F^. TuYSSfi ) found in most of theclutches in separate nests the mutual dif-ference between the eggs of one clutchto be much less than in those in colonics. ) See: Jac. P. Thysse and R. Tepe, „Het intieme leven der Vogcls(Haarlem, 1906) p. 9. Family STERNIDAE. Sterna macrura Naumann ) — Arctic Tern. (Folates 177-178, fig. n-li).(Snouckaert: Avifauna Neerlaiidica, p. 116, No. 275). Colour of surface of shell: like that of the preceding
. Oologia neerlandica : eggs of birds breeding in the Netherlands . mate-rial. (Breeds in colonies). generally 3. May—June. about 18 days. Mr. J AC. F^. TuYSSfi ) found in most of theclutches in separate nests the mutual dif-ference between the eggs of one clutchto be much less than in those in colonics. ) See: Jac. P. Thysse and R. Tepe, „Het intieme leven der Vogcls(Haarlem, 1906) p. 9. Family STERNIDAE. Sterna macrura Naumann ) — Arctic Tern. (Folates 177-178, fig. n-li).(Snouckaert: Avifauna Neerlaiidica, p. 116, No. 275). Colour of surface of shell: like that of the preceding of spots: „ „ „ „ „ „ Average dimensions: .\ 29 millimetres. Average weight of shell: about 1 gram. Texture of shell: like that of the preceding : „ , .i „ „ „ Nest and its site: „ „ „ „ „ „ Number of eggs: usually 2. Breeding season: end of May, June. Duration of incubation: about 18 days. ) See also the general review of the XLI. and XLll. Families, under:S. fluviatitis and S. macrura. Fam. LARIDAE. 165.
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Keywords: ., bookauthorpeltlech, bookcentury1900, bookdecade1910, bookyear1911
