“To test the birds’ recognition of faces separately from that of clothing, gait and other individual human characteristics, Dr. Marzluff and two students wore rubber masks. He designated a caveman mask as ‘dangerous’ and, in a deliberate gesture of civic generosity, a Dick Cheney mask as ‘neutral.’”
Crows can identify and remember individual human faces

Notes

  1. arosegonzalez reblogged this from mattlehrer
  2. mattlehrer posted this