Laserfiche WebLink
IZEASCNS EM LUMME <br /> The dramatic population decline fr<an historic levels has been attributed <br /> to loss of native nesting and foraging habitat, and more recently fr m the <br /> conversion of agriculture to urban land uses, changes to it =rpatible crop <br /> types and loss of suitable nesting trees. In addition, pesticides, shooting, <br /> disturbance at the nest site, and other disturbances on wintering areas may <br /> have contributed to their decline. The loss of nesting habitat within <br /> riparian areas has been accelerated by flood control practices and bank <br /> stabilization programs. Smith (1977) estimated that in 1850 over 770,000 <br /> acres of riparian habitat were present in the Sacramento Valley alone. 'Today <br /> less than 12,000 acres of riparian habitat remain. A 98% decrease in <br /> riparian vegetation has been documented within the Central Valley (Katibah <br /> 1983) ._ <br /> In summary, management needs of the Central Valley population of <br /> Swainson's hawks include ensuring the availability of suitable nesting habitat <br /> through the 1) preservation and recruitment of suitable nesting trees, 2) <br /> protection of existing nesting habitat from destruction or disturbance, 3) <br /> maintenance of compatible agricultural practices to preserve forage habitat, <br /> and 4) mitigation for loss of breeding and/or foraging habitat. Coordination <br /> and cooperation with local agencies must be continued to prevent further <br /> habitat destruction from development projects. <br /> 6 <br /> VI-18 <br />