Red-necked grebes become semicolonial when prime nesting substrate is available

Red-necked Grebe (Podiceps grisegena) Science Article 1

abstract

During 1995-1998 we studied the dynamics of nesting dispersion in a population of 160-200 Red-necked Grebes (Podiceps grisegena) on Lake Osakis, a large, windblown lake in central Minnesota. Breeding grebe pairs arriving on the lake were highly attracted to several large floating cattail (Typha angustifolia) mats that had broken off and drifted away from the mainland to become

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