Kaeli Swift (https://corvidresearch.blog/ and https://twitter.com/corvidresearch ) has an FAQ on this at https://corvidresearch.blog/faqs-about-crows/#crows-funeral:

> 4) Why do crows gather around their dead? Certainly one reason is that the death of a crow can offer a “teachable moment” that other crows use to learn that the place and responsible party is dangerous. You can read more about this behavior here: https://corvidresearch.blog/2015/09/26/why-crows-gather-arou...