Table 1.
Bird taxonomic hierarchy and 4-letter codes for species identification.
Table 2.
Explanatory variables and their levels included in binomial and zero-inflated models.
Table 3.
Bird infection and tick infestation modeling goals and best supported models, based on AIC and AICc values.
Table 4.
Summary of Ixodes pacificus infestation on birds, Borrelia burgdorferi s.l. (BBSL) infection in bird blood, and number of BBSL infected larvae by bird species.
Fig 1.
Prevalence (by %) of infection of birds, I. pacificus larvae and nymphs with different genospecies of Borrelia.
Table 5.
Summary of B. burgdorferi s.l. genospecies found in birds.
Table 6.
Summary of B. burgdorferi s.l. genospecies found in I. pacificus larvae removed from birds.
Table 7.
Summary of B. burgdorferi s.l. genospecies found in I. pacificus nymphs removed from birds.
Fig 2.
Body weight as a null model for presence or absence of tick infestation and B. burgdorferi s.l. infection in birds.
Graphs depict: (a) larvae per bird by log(average body weight), (b) nymphs per bird by log(average body weight), and (c) bird infection by log(average body weight). Each data point represents one bird species. One outlier point in plot (a) represents Lark Sparrows (Chondestes grammacus). The solid line is a regression on all species, while the dotted-line is a regression on zero-truncated data (species with positive results only).