This morning five brown jays were flying around and landing on the nopales outside our living room windows. They were eating the tiny flower buds and in between bites chattering with each other.. I found a recording of their sounds and was amazed to see them come to swift attention, looking towards me to try to understand where the sound was coming from. They clearly recognized it. You can read about the jays and listen to them here.
Here you can see three of them (click on the image for a larger view). A gas truck came by playing its jingle with the man on the back banging on the tanks to keep the beat. It scared the birds away, though they look too big to me to be scared away.