corvid
IB-corvid-durable-memory
A single ~5-minute trapping event teaches wild American crows a specific threatening human face: mask-specific scolding persists at least 2.7 years and SPREADS, rising from ~26% to ~66% of crows, while a neutral-mask control stays flat.
Observed quantities
one ~5-min exposure -> scolding for >=2.7 yr; ~26% -> 30.4% -> ~66% of crows scolding; stimulus:persistence ratio ~5-6 orders of magnitude (5 min vs 2.7 yr)
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Primary source
- Marzluff et al. 2010 (report cites year only; venue not specified in the report)
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Boundary of this block
The report gives 'Marzluff et al. 2010' without a venue; flagged for a citation pass (do not fabricate).
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Connections
Outgoing
- relates to Physarum polycephalum encodes the location of a past nutrient stimulus in its tube-diameter hierarchy: tubes toward the food dilate and the diameter pattern persists after the stimulus itself is gone. controller-less durable memory outlasting its stimulus by orders of magnitude
- relates to Crow scolding of a known dangerous-human mask DOUBLED and spread at least 1.2 km over 5 years, with LINEAR (non-saturating) growth — a saturating/plateau model was statistically rejected. the same acquired memory then propagates through the population