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• <br />16 <br />Breeding status for loggerhead shrikes is considered probable, as four to six individuals <br />have been observed at the Site throughout the year. Loggerhead shrikes have been <br />observed in all three drainages at the Rocky Flats Environmental Technology Site in all <br />of the major habitat types including grassland, disturbed areas, shrubland, woodland, <br />artd marshland. More specifically, they have been recorded in cottonwoods, <br />chokecherry, xeric grassland areas, and habitats with some Ponderosa pine Pinus <br />ponderosa (Department of Energy 1994b; Marcia Murdock -personal communication). <br />The loggerhead shrike is ranked G4/S3 by the Natural Heritage Network. This rank <br />indicates a widespread distribution globally while at the same time, rare in Colorado. <br />7'he loggerhead shrike is not uncommon in the shrubby portions of Colorado, but is <br />known to be declining seriously in most of the species' range. The species is recognized <br />try the U. S. Fish and Wildlife Service as a Category 2 species, meaning that evidence <br />exists suggesting that the loggerhead shrike may qualify for listing as a threatened or <br />endangered species. <br />E;lack-crowned night-herons have been observed frequently during the breeding season <br />at the Lindsay agricultural pond in the Rock Creek Drainage. This rank (G5/S3B) <br />indicates that the species is globally common, but that breeding status in the state is <br />rare to uncommon. Probable breeding is suggested as a pair was observed throughout <br />t:te breeding season in suitable nesting habitat. Adults have been observed in disturbed <br />habitats, shrubs, marsh, and woodland habitats. Two young were seen at the Lindsay <br />agricultural pond later in the season (Department of Energy 1994b; Marcia Murdock - <br />personal communication). <br />