Storms and mammalian predation severely reduced production in a Black-crowned Night Heron (Nycticorax nycticorax) colony in two years and drought prevented nesting in two other years from 1976 to 1980. Maximum estimated production was 2.2 young per pair in 1978, the only year production was sufficient to maintain the population.
|Title||Observations on black-crowned night heron breeding success in a North Dakota marsh|
|Authors||R. J. Greenwood|
|Publication Subtype||Journal Article|
|Series Title||Canadian Field-Naturalist|
|Record Source||USGS Publications Warehouse|
|USGS Organization||Northern Prairie Wildlife Research Center|