Species analysis
Statistical exploration
Classification trees
Variables
Lewis's Woodpecker
Occurred the most disproportionately in hexagons with any ponderosa
pine forest. In the more southerly of such areas, its distribution
corresponded mostly with June precipitation (hex. med.) of 24-29 mm,
whereas in the more northerly such areas, it occurred mostly in
hexagons with a relatively warm May minimum temperature (hex.
med.) of 1-5� C. Among hexagons having no little or no ponderosa
pine forest, it was most likely where there are more than 1% ponderosa
- white oak woodland. The logistic regression analysis showed positive
or negative association with ponderosa pine forest, April precipitation
(hex. min.), and-to a lesser degree-number of land cover types,
ponderosa - white oak woodland, April minimum temperature (hex.
min.), and April maximum temperature (hex. min.).
Classification trees
Hexagons: using ONHP land cover classification (accuracy score: 82.24)
Squares: using ONHP land cover classification (accuracy score: 93.47)
Hexagons: using AVHRR land cover classification (accuracy score: 80.37)
