<p>As a photojournalist I carried a press card for many years. I have even had Secret Service, Olympics and United Nations press cards. Press cards used to be magic especially in New York City and Los Angeles because the police were known to be serious about checking press card holders out.<br>
But today's world is a different one. A lot of jurisdictions don't give out press cards, they are afraid of a lawsuit for preventing legitimate press photographers from doing their job.<br>
As for non-press photographers, the world seems to be full of busybodies these days. I wonder what having a "large camera" has to do with anything.<br>
I read about one guy who wore a loud neon safety-type sleeveless jacket when he did street photography -- no one could say he was sneaking around. Maybe you should think about a jacket that says "Bird Photographer" in big letters on the back. You should not have to do this but times are a'changing and not for the better. Good luck.</p>