On one entry, I did my usual loud "Hello, Realtor!" announcement and heard "Hello" back. I didn't enter. "Hello, Realtor!" again and "Hello" back. He really was a very friendly parrot.
On this subject, it's also best to go to the door, knock and gain access before walking the yards. If there is an owner or tenant at home, you want them to know that you're there before they see you through a window in their back yard.
