Tamilian here. There was a crow that would come and insist upon getting Biscuits only from my mother, pre covid. It would sit on the balcony handrail and caw until she goes to the fridge, then quietly wait for the biscuit, take it from her hand and leave. If she's out of Biscuits and gives it something else it would become quite offended, refuse the food and sit there cawing pitieously. I learned that Biscuits are bad for them and told her. She tried to change to curd rice - it started to accept that if it was hot and fresh.

Of course like you said, we caw for them and give them food during festivals and anniversaries of deaths of ancestors.