{
  "oags": "0.2",
  "status": "alpha",
  "entry": {
    "id": "IB-corvid-durable-memory",
    "type": "evidence",
    "claim": "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.",
    "evidence_grade": "E1",
    "state": "verified",
    "primary_source_ref": [
      "Marzluff et al. 2010 (report cites year only; venue not specified in the report)"
    ],
    "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)"
  },
  "expand": [
    {
      "rel": "relates",
      "target": "IB-physarum-tube-memory",
      "href": "https://infoblock.org/b/IB-physarum-tube-memory/oags.json"
    },
    {
      "rel": "relates",
      "target": "IB-corvid-spread-linear",
      "href": "https://infoblock.org/b/IB-corvid-spread-linear/oags.json"
    }
  ],
  "incoming": [
    {
      "rel": "relates",
      "from": "IB-physarum-tube-memory",
      "href": "https://infoblock.org/b/IB-physarum-tube-memory/oags.json"
    }
  ],
  "links": [
    "https://infoblock.org/b/IB-physarum-tube-memory/",
    "https://infoblock.org/b/IB-corvid-spread-linear/",
    "https://infoblock.org/b/IB-physarum-tube-memory/"
  ],
  "declared_losses": [
    "Public evidence-graph projection: internal analytic/theory edges and private provenance are withheld by design (empirics-only surface).",
    "Alpha: some primary-source refs are pending precise citation verification."
  ],
  "generated": "2026-07-30"
}