During cache recovery experiments, Clark's nutcrackers (Nucifraga columbiana) often revisit cache sites that were emptied during previous recovery sessions (Kamil & Balda 1985). In the current experiments, nutcrackers were allowed to cache pine seeds and recover them in several recovery sessions. The results of two experiments demonstrate that neither leaving signs of previous digging activity nor leaving many pine seeds in the caches affects the tendency to revisit.
ASJC Scopus subject areas
- Ecology, Evolution, Behavior and Systematics
- Animal Science and Zoology