Date: 7/7/17 9:16 am From: Craig Miller <gismiller...> Subject: [obol] Re: Astronomical Ravens
All the credit for any research and conclusions must be credited solely to Robert's brilliant insights.
I just take the photos and let others take it to the next level.
On Jul 6, 2017 10:08 PM, "Robert O'Brien" <baro...> wrote:
> Craig Miller recently posted an astounding Ravens photo he took in central > Oregon: > http://birding.aba.org/message.php?mesid=1306340&MLID=OR01&MLNM=Oregon > > He found a flock of 106 of these birds in the air together. > Now, 106 Ravens in a single flock isn't astronomical. I've seen similar > numbers there a time or two. > It's what they were doing that was astronomical. > > Now most birders know that birds regularly fly long distances at night > while navigating by the stars. > But how did they learn to do this? Well Craig has happened upon the > answer. > > http://ebird.org/ebird/view/checklist/S37912427 > > You might think that they would have these lessons at night. But of > course, they can't see each other then > because they're black. So they have to do them during the day. In > Craig's photo they're still learning of course. > They don't have the pointer stars (pointing at the north star) quite > right, and they may not know about the > double star in the middle of the handle. But the season is still early > and there's plenty of time to learn more. > > Nice, ground-breaking research Craig. > > Bob OBrien > > See Craigs's photo attached. >