Table 6. Clark’s nutcracker foraging habitat selection from within the home range.
Habitat | Food type | ||||||
---|---|---|---|---|---|---|---|
All | Invertebrates | Douglas-fir seeds | Seed caches | ||||
2011 | 2012 | 2011 | 2012 | 2011 | 2012 | 2012 | |
Whitebark pine, moderate to high mortality | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Whitebark pine, high mortality | 0 | + | 0 | = | 0 | 0 | = |
Limber pine | = | NA | = | NA | 0 | NA | NA |
Douglas-fir | = | = | = | = | = | = | = |
Other conifers | = | = | = | = | = | = | = |
Non-conifer | = | = | = | - | = | = | = |
The habitat within the home range was considered the available habitat, and the habitat where foraging events occurred was considered used habitat. “+” = habitat used in higher proportion than the proportion available; “=“ = habitat used in the same proportion as the proportion available; “-” = habitat used in lower proportion than the proportion available; “0” = habitat never used; “NA” = habitat was not available within home ranges. Habitat selection for foraging on seed caches was not included for 2011 as I only observed two events.