Table 1 Contrafreeloading type definitions with examples.
From: Contrafreeloading in kea (Nestor notabilis) in comparison to Grey parrots (Psittacus erithacus)
Type | Definition | Example(choice of lidded/shell option) |
|---|---|---|
Calculated | Performing an activity to access preferred food over less-preferred, free food | Fat (lidded) versus sultana (unlidded) Fat (lidded) versus hazelnut (unlidded) Hazelnut (lidded) versus sultana (unlidded) |
Classic | Performing an activity to access food identical to the free food | Fat (lidded) versus fat (unlidded) Hazelnut (lidded) versus hazelnut (unlidded) Sultana (lidded) versus sultana (unlidded) |
Super | Performing an activity to access less-preferred food over preferred, free food | Hazelnut (lidded) versus fat (unlidded) Sultana (lidded) versus hazelnut (unlidded) Sultana (lidded) versus fat (unlidded) |
Nut | Performing an activity to access nut in shell over nut without shell | Nut (with shell) versus nut (without shell) |
