1991 Great Blue Heron and Black-crowned Night Heron, Census for Naval Submarine Base, San Diego, California
Platter-Rieger MF. 1991. 1991 Great Blue Heron and Black-crowned Night Heron, Census for Naval Submarine Base, San Diego, California. Unpublished Technical Reports. Code 522. Naval Oceans Systems Center. San Diego, CA
Describes status of herons on Point Loma - current and historic nesting sites, population counts, numbers of young successfully fledged. Discusses human impacts and habitat requirements and gives some management recommendations... The Great Blue Herons (Ardeq, herodias) and Black-crowned Night Herons (Nycticorax nycticorax) have occupied separate breeding colonies on the tip of Point Loma at Naval Submarine Base, San Diego (Subase), southern California, for many years (Platter-Rieger, 1981, Unit 1984). Great Blue Herons breed locally in scattered colonies (Table 1), then winter widely dispersed over the southwestern United States (Unitt 1984, Root 1988). The Great" Blue Herons present in southern California appear to be resident year around (Palmer 1962, Brandman 1976), although most individuals leave the heronry area after the breeding season. Some of the southern California population probably moves into Mexico for the winter and, like all ardeids, the young disperse widely after the breeding season. Unitt (1984) and Root (1988) note that Blackcrowned Night Herons are resident year around within this area. Indicating wide dispersal, Ryder (1979) reports recovery, in three different locations in Mexico, of three out of 83 Great Blue Herons banded in Colorado from 1929 to 1976. Also 94 of 2,917 + Black-crowned Night Herons banded in Colorado from 1929 to 1977 were recovered from 12 separate locations in Mexico, Colorado, Missouri, Kansas, Oklahoma, Idaho, South Dakota, New Mexico, and Texas.
- Type
- Published Report
- Authors
- Platter-Rieger, Mary
- Date of Issue
- 1991
- Publisher
- Naval Oceans Systems Center
- Units
- CABR
- Keywords
- Animal Studies, Black-Crowned Night Heron (Nycticorax nycticorax), Great Blue Heron (Ardea herodias), Management, Nests & Nesting, Point Loma CA, Population