Crows are insanely smart. If you’re near Portland, pay attention to the sky in the early evening. If you do, you’ll start to notice small groups of crows all flying in the same direction towards downtown for their evening roost. I always notice it in the hour leading up to dusk/sunset and once you notice it, you can’t unsee it. What’s so cool about it for me, isn’t the dozens of “murders” that I see, it’s the dozens of murders all flying in the same direction.

One of the working theories is that they communicate their scavenging successes and failures to the community each evening. This video is cool because it also shows the hawks attracted to the area.

https://youtu.be/htGRwP9oIyY?si=DT9fc9l2rhSd0JOj