A team has now set out to unpick just why crows act so attentively around their fallen brethren.
To do so, they set up an innovative experiment, capitalising on the knowledge that crows do not forget a threatening face.
A series of studies led by John Marzluff of the University of Washington in Seattle, US, revealed that crows will remember an apparently dangerous individual.
They would be holding a dead crow, palms outstretched like you might hold a plate of hors d'oeuvre.
These results show that crows will avoid an area or thing that is deemed dangerous to their own species.
"It tells us that crows view death, at least in part, as a 'teachable moment' to borrow an anthropomorphic phrase.
Crows are now the latest in the small group of animals that are known to recognise, or perhaps even mourn their dead. »