Species analysis
Statistical exploration
Classification trees
Variables
Yellow Warbler
Occurred the most disproportionately in hexagons with relatively great
stream density and June precipitation less than 97 mm (hex. max.).
Also occurred in hexagons with relatively great stream density and
July minimum temperatures of 3 to 9� C (hex. med.). Somewhat less
likely in hexagons with flat topography and low stream density (less
than 2 miles of stream per sq. mi.). The logistic regression analysis
showed positive or negative association with wetlands and wet
shrubland, May minimum temperature (hex. min.), and-to a lesser
degree-mixed conifer forest (Northeast Oregon), number of land
cover types, and July minimum temperature (hex. min.).
Classification trees
Hexagons: using ONHP land cover classification (accuracy score: 84.65)
Squares: using ONHP land cover classification (accuracy score: 75.13)
Hexagons: using AVHRR land cover classification (accuracy score: 84.65)
