Viral meme about a 'calmest Raven' and ravens tolerating people at dawn and dusk

A Mastodon post says ravens seem most tolerant of humans at the start and end of the day, possibly tied to grooming. A separate Hacker News link about dawn and dusk phenomena is unrelated to the post's claim.

Timeline

1. 23 Oct, 23:33 UTCFirst appeared on Jerome G

Top sources

• This was the calmest Raven from the morning. They seem to be most tolerant of human presence at the beginning and end ofJerome G
• The phenomena that brighten dawn and dusk (2016)Hacker News