female body weight (g) during Mean: Dunning 1984 breeding season 13.8 SD:0.31 Min:12.3 Max:16 diet composition during breeding 100% It is assumed that consume primarily invertebrates during the breeding season, however, season insects they will also consume fruit (e.g., blueberries). (Mayfield 2014) Feeding category insectivore mean number of nest attempts/ female/ season mean number of successful broods/ female/ season mean number of fledglings/ fpsn After cowbird control was institutionalized in 1972, several studies estimated productivity: successful nest Shake and Mattson (1975) reported 2.84 young fledged per nest in 1972, on average; Kelly and DeCapita (1982) reported 2.76 young fledged per nest per year from 1972-1981; Bocetti (1994) found 3.59 young fledged per nest attempt in 1990-1992; Rockwell (2013) reported 2.72 fledglings per nest attempt from 2007-2009. mean number of fledglings/ female/ ARS 2.2 Productivity varies from year to year, but estimates over early decades (cowbirds present in season (ARS) area) show production of young per pair without interference by cowbirds was about 2.2 fledglings, vs. 0.8 in parasitized nests. Annual adult survival phi 0.65 Survival rate of adults from one June to the next is about 65% (Mayfield 1960, Walkinshaw 1983; C. Bocetti, C. Kepler, and P. Sykes, unpubl. data.). Frequency on Mean: 0 Based on habitat (Table 2), low frequency on field is expected for agricultural habitats. Min: 0.1 Individuals may forage on agricultural fields. Max:0.2 Residency Edge on habitat (see Table 2) Passerine? Yes Precocial/ altricial Altricial Table 15. Black-capped Vireo (Vireo atricapilla). Species life history parameters Model Typical value Rationale/Comments Code Initiation probability p 0.25 default
female body weight (g) during breeding season Mean: 13.8 SD:0.31 Min:12.3 Max:16 Dunning 1984 diet composition during breeding season 100% insects It is assumed that consume primarily invertebrates during the breeding season, however, they will also consume fruit (e.g., blueberries). (Mayfield 2014) Feeding category insectivore mean number of nest attempts/ female/ season mean number of successful broods/ female/ season mean number of fledglings/ successful nest fpsn After cowbird control was institutionalized in 1972, several studies estimated productivity: Shake and Mattson (1975) reported 2.84 young fledged per nest in 1972, on average; Kelly and DeCapita (1982) reported 2.76 young fledged per nest per year from 1972-1981; Bocetti (1994) found 3.59 young fledged per nest attempt in 1990-1992; Rockwell (2013) reported 2.72 fledglings per nest attempt from 2007-2009. mean number of fledglings/ female/ season (ARS) ARS 2.2 Productivity varies from year to year, but estimates over early decades (cowbirds present in area) show production of young per pair without interference by cowbirds was about 2.2 fledglings, vs. 0.8 in parasitized nests. Annual adult survival phi 0.65 Survival rate of adults from one June to the next is about 65% (Mayfield 1960, Walkinshaw 1983; C. Bocetti, C. Kepler, and P. Sykes, unpubl. data.). Frequency on Mean: 0 Min: 0.1 Max:0.2 Based on habitat (Table 2), low frequency on field is expected for agricultural habitats. Individuals may forage on agricultural fields. Residency Edge on habitat (see Table 2) Passerine? Yes Precocial/ altricial Altricial Table 15. Black-capped Vireo (Vireo atricapilla). Species life history parameters Model Code Typical value Rationale/Comments Initiation probability p 0.25 default
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