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Soil Investigations for Data Collection in the Delta Initial Study/Proposed Mitigated Negative Declaration 71 BIO-1 and MM BIO-6 would reduce potential impacts to Osprey to: Less than Significant with Mitigation Incorporated. White-faced Ibis (Plegadis chihi) The White-faced Ibis is on the CDFW watch list. White-faced Ibis is a dark wading bird with long decurved bill; breeding adults have metallic bronze plumage with dark green wings. The species’ range includes western and central United States and winters in southeastern California, Gulf Coast, and Mexico (Ryder and Manry 1994); in California breeds uncommonly in southern California, and in isolated areas of the Central Valley (CDFW 2005d). White-faced ibis breeds in freshwater emergent and managed wetland habitats (CDFW 2005d) with cattail and bulrush, and also forages in flooded meadows, agricultural fields, and brackish wetlands (Ryder and Manry 1994). The species probes in mud for earthworms and invertebrates and will also forage in shallow water for amphibians and small fish (CDFW 2005d). White-faced Ibis nests colonially in dense emergent vegetation. Breeding occurs May-July (CDFW 2005d). White-faced Ibis is considered to have a moderate potential to occur within the Study Area due to the presence of suitable habitat and many recorded occurrences throughout the Study Area. Breeding white-faced ibis have been recorded in the Yolo Bypass Wildlife Area but are not expected to breed in the remainder of the Study Area. Implementation of Mitigation Measures MM BIO-1 and MM BIO-8 would reduce potential impacts to White-faced ibis to: Less than Significant with Mitigation Incorporated. Purple Martin (Progne subis) Purple Martin is a California Species of Special Concern. Purple Martin is a large swallow with purple plumage and dark wings; females are duller with some gray plumage. The species breeds primarily in the eastern United States and winters in Mexico to central South America, but it also breeds in coastal Northern California, Sierra Nevada, and isolated locations in the Central Valley (Brown and Tarof 2013). Purple Martin inhabits woodlands, urban parks, and wetlands, often near cities (Airola and Williams 2008). An aerial insectivore, Purple Martin diet consists of a variety of flying insects caught while flying over open areas, including parks, open water, and wetlands. Nests are built in cavities and manmade structures such as bird houses. Breeding occurs between May and mid-August (Airola and Williams 2008). Purple Martin is considered to have a low potential to occur within the Study Area due to minimal suitable nesting habitat and rare occurrences in the vicinity of the Study Area. Implementation of Mitigation Measures MM BIO-1 and MM BIO-8 would reduce potential impacts to Purple Martin to: Less than Significant with Mitigation Incorporated.