본 연구는 백로류 집단번식지의 보호 및 관리에 대한 기초자료를 제공하기 위하여 2005년도 번식기에 전라남도 전역을 대상으로 번식지의 분포, 번식조류 종류 및 개체수에 대한 센서스를 실시하고 백로류 생태에 중요한 번식지 특성을 파악하였다. 센서스 결과 집단번식지는 총 17개소, 번식종류는 6종이 확인되었으며 왜가리와 중대백로가 가장 많은 지역(각각 92%)에서, 가장 많은 수(36.3%, 31.0%)가 번식하는 것으로 나타났다. 번식지 식생은 대나무 군락이 53.3%로 가장 많았다. 번식지 면적은 평균 $2,346m^2(500{\sim}7,000m^2$), 가까운 두 번식지간 거리는 평균 18.1km($5.6{\sim}40.4km$), 번식지와 마을간 거리는 평균 297m($10{\sim}2000m$), 번식지 경사도는 평균 $18^{\circ}(2^{\circ}{\sim}40^{\circ})$ 이었으며 번식지 사면방향은 동쪽이 40.0%로 가장 많았다.

We studied the behavior of black vultures breeding in Erdenesant, Mongolia through time budget observation. We observed a pair of black vulture for 115 days from April 30 to August 22, 2005, of which 15 days were before hatching and 100 days of brood rearing. The egg hatched on May $14^{th}$. Incubation was done by both a male and female vultures, but the period covered by the male vulture(56.82%) was longer than that by the female one(34.62%). In the early days of brood rearing, time spent by the female vulture at the nest took 54.9 % and it was 19.27% for the male. In the middle of brood rearing period, just inaction and preening were noticed, as they watched their chicks for a long time without sheltering chick under the parent's body. Late brood rearing period was characterized by less chick care and adults mostly stayed in the nest only when to feed the chicks. During breeding time, both the male and the female vulture fed only the chicks and did not give food to each other. During rearing period, the male vulture fed the chick more often than female.