Infoblock · public evidence graph · corvid

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.

✓ VERIFIED

Grade E1 · state: verified · id: IB-corvid-durable-memory

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)

Primary source

Marzluff et al. 2010 (report cites year only; venue not specified in the report)

Edges (outgoing)

• relates → Physarum polycephalum encodes the location of a past nutrient stimulus — controller-less durable memory outlasting its stimulus by orders of magnitude
• relates → Crow scolding of a known dangerous-human mask DOUBLED and spread at le — the same acquired memory then propagates through the population

Incoming edges (what points here)

• Physarum polycephalum encodes the location of a past nutrient stimulus — relates → this (controller-less memory that outlasts the stimulus that created it (Physarum tubes ~ crow faces))