There is this Lizard Buzzard that visit the garden on a weekly basis. Sometimes staying a few days. He’s favourite perch is in the Jackalberry tree overlooking the garden. When he/she is around the garden obviously becomes a bit quiet. All the birds are on alert and move from thicket to thicket instead of flying in the open and becoming a target. I guess they view all raptors as a threat no matter what may or may not be on the raptor’s menu.