"Oologia Neerlandica": Eggs of Birds Breeding in the Netherlands, Volume 2

aeruginosus ANATIDAE ARDEIDAE Astur Average dimensions Average weight Avifauna Neerlandica bellied bluish green Breeding season Breeds in colonies brownish yellow chalk layer CHARADRIIDAE Charadrius apricarius cinerea clutches Colour of spots Colour of surface COLUMBIDAE consists of vegetable cyaneus dry vegetable material dull tint Duration of incubation eggshell it shows elongated Falco and Cerchneis FALCONIDAE fundamental layer genera glutinous layer grams grass green ground colour greenish blue greyish green JOHN CRERAR LIBRARY June LARIDAE LIBRARY Fam light shines limosa little hollow MARTINUS NIJHOFF May-June millimetres Nest Number of eggs occur older female birds olive green olive yellow oocyanin oologically oval ovoidal Pernis Plate pores pyriform querquedula RALLIDAE reeds SCOLOPACIDAE sea green Shape shell it shows show through grey show through violet slightly Small feathers smooth Snouckaert species specks Sterna STERNIDAE surface of shell Texture of shell tinged underlying spots show usually various shades weight of shell yellowish brown