Some data on oology of grebes from the Prut-Dniester interfluve of Ukraine and the Precarpathians. - I.V. Skilsky, V.V. Buchko, B.I. Godovanets. - Berkut. 8 (2). 1999. P. 147-149.
Data were collected in 1990-1994. Three grebe species were studied in Chernivtsi and Ivano-Frankivsk regions. Clutch sizes are presented in the Table 1. 374 eggs from 118 clutches were measured (Table 2). The Great Crested Grebe begins breeding in middle of April - beginning of May, the Red-necked Grebe - in middle and second half of May, the Black-necked Grebe - in the first and second decades of June. Main oomorphological parameters are little variable. The least values of the coefficient of variation are characteristic for the maximum egg diameter, the maximum ones - for the volume. It is determined, that the most favourite breeding conditions for the Red-necked Grebe are in valley of the Upper Dniester (Precarpathians), for the Great Crested Grebe - in the Prut-Dniester interfluve. [Russian].
Key words: grebes, Carpathians, breeding, phenology, egg, measurement, clutch size.
Address: I.V. Skilsky, Bukovinska str. 9/4, 58001 Chernivtsi, Ukraine.