Federal Register - May 5, 2021
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Source: Federal Register
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Federal Register / Vol. 86, No. 85 / Wednesday, May 5, 2021 / Proposed Rules
acres in 2009 USFWS 2009, p. 8 to approximately 13,132 ha 32,449 acres, almost 90 percent of the island Meiman et al. 2018, p. 5. As the native habitats recovered following the removal of the nonnative grazing and browsing animals, the distribution of SC
Bells sparrow expanded on SCI
Meiman et al. 2019, pp. 24. It is likely that sparrows used boxthorn as a refuge and started using other substrates before we recognized them as nesting habitat.
While the SC Bells sparrow is now distributed widely across the island see Figure 1, below, its density varies greatly spatially and among vegetation
types. While sparrows may be found in some habitat strata mapped as grasslands, many grassland areas do not support SC Bells sparrow, likely due in part to the lack of shrub cover.
BILLING CODE 433315P
Bird Rock Nerti Head I Northwest Whale
Point
Pyramid Head
China Canyon Chanetll Canyon
San Clemente Bella Sparrow Artem/slosplra bel/f clementeae 2019 Breeding Season Survey Strata Density Eatimates 0.04 0.05 lerritory/ha
O.l-.0.191erritorylha
0.3 lerritory/ha
0.37 territory/ha t Shore Bombardment Area Boundary
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Mnp Dal$: JWG2, 2020
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16:56 May 04, 2021
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05MYP1
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Figure 1. Map showing distribution of San Clemente Bells sparrow.
