Table 1.
Birds sampled in the East Valley of Maricopa County, AZ, during September and October 2010 after an outbreak of human West Nile neuroinvasive disease and detection of West Nile virus-neutralizing antibodies (by species and age class*)
| Bird species Latin name | Hatch-year | After-hatch-year | All ages | |||
|---|---|---|---|---|---|---|
| No. WN pos. (N) | prop. (95% CI) | No. WN pos. (N) | prop. (95% CI) | No. WN pos. (N) | prop. (95% CI) | |
| Mallard† Anas platyrhynchos | 4 (8) | 0.50 (0.22–0.79) | 3 (8) | 0.38 (0.14–0.69) | 7 (17) | 0.41 (0.27–0.64) |
| American Kestrel† Falco sparverius | – | NT | – | NT | 1 (1) | 1.00 (0.21–1.00) |
| Inca Dove Columbina inca | 6 (12) | 0.50 (0.25–0.75) | 12 (12) | 1.00 (0.76–1.00) | 18 (24) | 0.75 (0.55–0.88) |
| Mourning Dove† Zenaida macroura | 19 (54) | 0.35 (0.24–0.48) | 11 (14) | 0.79 (0.52–0.92) | 31 (69) | 0.45 (0.34–0.57) |
| White-winged Dove Zenaida asiatica | 0 (1) | 0.00 (0.00–0.79) | 1 (2) | 0.50 (0.09–0.91) | 1 (3) | 0.33 (0.06–0.79) |
| Eurasian Collared-Dove Streptopelia decaocto | 0 (3) | 0.00 (0.00–0.56) | 1 (1) | 1.00 (0.21–1.00) | 1 (4) | 0.25 (0.05–0.67) |
| Northern Mockingbird Mimus polyglottos | – | NT | 1 (1) | 1.00 (0.21–1.00) | 1 (1) | 1.00 (0.21–1.00) |
| Curve-billed Thrasher Toxostoma curvirostre | – | NT | 2 (2) | 1.00 (0.34–1.00) | 2 (2) | 1.00 (0.34–1.00) |
| Abert's Towhee Pipilo alberti | – | NT | 0 (1) | 0.00 (0.00–0.79) | 0 (1) | 0.00 (0.00–0.79) |
| European Starling Sturnus vulgaris | 0 (1) | 0.00 (0.00–0.79) | – | NT | 0 (1) | 0.00 (0.00–0.79) |
| Red-winged Blackbird Agelaius phoeniceus | 4 (4) | 1.00 (0.51–1.00) | 3 (5) | 0.60 (0.23–0.88) | 7 (9) | 0.78 (0.45–0.94) |
| Yellow-headed Blackbird X. xanthocephalus | 0 (2) | 0.00 (0.00–0.66) | – | NT | 0 (2) | 0.00 (0.00–0.66) |
| Great-tailed Grackle Quiscalus mexicanus | 5 (6) | 0.83 (0.44–0.97) | 1 (1) | 1.00 (0.21–1.00) | 6 (7) | 0.86 (0.49–0.97) |
| Bronzed Cowbird Molothrus aeneus | 2 (7) | 0.29 (0.08–0.64) | – | NT | 2 (7) | 0.29 (0.08–0.64) |
| Brown-headed Cowbird Molothrus ater | 6 (30) | 0.20 (0.10–0.37) | 1 (10) | 0.10 (0.02–0.40) | 7 (40) | 0.18 (0.09–0.32) |
| House Finch Haemorhous mexicanus | 3 (3) | 1.00 (0.44–1.00) | 2 (2) | 1.00 (0.34–1.00) | 5 (5) | 1.00 (0.57–1.00) |
| House Sparrow Passer domesticus | 42 (82) | 0.51 (0.41–0.62) | 13 (25) | 0.52 (0.34–0.70) | 55 (107) | 0.51 (0.42–0.61) |
*
Hatch-year is < 1 year of age; After-hatch-year is ≥ 1 year of age.
†
These species had one bird of undetermined age.
NT = not tested; CI = confidence interval.