@article {7557,
	title = {Comparative nest site selection and breeding success in 2 sympatric ardeids, Black-crowned Night-Heron (<i>Nycticorax nycticorax</i>) and Little Egret (<i>Egretta garzetta</i>) in the Axios Delta, Macedonia, Greece},
	journal = {Colonial WaterbirdsColonial Waterbirds},
	volume = {20},
	number = {3},
	year = {1997},
	note = {TY  - JOURCited By (since 1996): 11Export Date: 7 September 2006Source: ScopusReferences: Allieri, R., Gariboldi, A., Fasola, M., Breeding habitat requirements of herons in the Central Po Valley (1988) Naturalista Sicil. S. IV XII (Supplement), pp. 29-32; Arendt, J.W., Arendt, I.A., Aspects of the breeding biology of the Cattle Egret (Bubulcus ibis) in Montserrat, West Indies, and its impact on the nest vegetation (1988) Colonial Waterbirds, 11, pp. 72-84; Ashkenazi, S., Yom-Tov, Y., Herons and fish farming in the Huleh Valley, Israel: Conflict or mutual benefit? (1996) Colonial Waterbirds, 19, pp. 143-151. , Ecology, conservation, and management of colonial waterbirds in the Mediterranean region (A. J. Crivelli, H. Hafner, M. Fasola, R. M. Erwin, and D. A. McCrimmon, Jr., Eds.). 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	month = {1997///},
	pages = {505-517},
	abstract = {We studied nest site selection and breeding success of Black-crowned Night-Herons (Nycticorax nycticorax) and Little Egrets (Egretta garzetta) in the Axios Delta (Greece) from 1988 to 1990. Both species nested above the middle of tamarisks and alders. Nest density varied each year from 333.3 nests/ha to 646.2 nests/ha for Blackcrowned Night-Herons and 291.7 nests/ha to 421.5 nests/ha for Little Egrets. Black-crowned Night-Herons started to breed earlier than Little Egrets, also placing their nests higher (mean nest height: 4.21 {\textpm} SD of 0.80 m and 3.54 {\textpm} SD of 0.71 m for Black-crowned Night-Herons and Little Egrets, respectively). The nearest neighbors were conspecifics for Black-crowned Night-Herons and heterospecifics (Black-crowned Night-Herons) for Little Egrets. The mean distance of the nearest neighbor was similar in both species (1.02 {\textpm} SD of 0.46 m and 1.11 {\textpm} SD of 0.37 m for Black-crowned Night-Herons and Little Egrets, respectively). In contrast to late-nesting Little Egrets that located their nests lower, Black-crowned Night-Herons maintained a constant nest distance from the ground. The mean clutch size (3.40 {\textpm} SD of 0.60 and 4.32 {\textpm} SD of 0.81 for Black-crowned Night-Herons and Little Egrets, respectively) and the mean chick survival per nest (2.48 {\textpm} SD of 0.95 and 2.53 {\textpm} SD of 1.28 for Black-crowned Night-Herons and Little Egrets, respectively) of both species varied among the study years. No variation was observed in the means of clutch size and chick survival per nest of Black-crowned Night-Herons among the 3 sub-periods of the breeding season. Little Egret clutch size and mean number of eggs hatched was smaller in late nesters, but no difference was observed in chick survival per nest between early and late nesters. Nest placement did not affect chick survival in Black-crowned Night-Herons and only marginally in Little Egrets.},
	keywords = {Aves, Axios Delta, Black-crowned Night-Heron, Breeding success, Egretta garzetta, Greece, Little Egret, Nest site selection, Nycticorax nycticorax},
	author = {Kazantzidis, S. and Goutner, V. and Pyrovetsi, M. and Sinis, A.}
}
