In-the Field Nature Photography Ethics as I See Them
I have never written on ton on the way folks should behave in the field other than with regards to other photographers. (See here for an example of the latter.) Why have I not written on the subject? Because ethics are simply a matter of common sense.... In addition, ethics are personal.
Here is my take:
1-Treat the birds, other photographers, birders, and the habitat with respect.
2-If you approach a bird two or three times, and it continues to flush, leave it alone. As bird and wildlife photographers, we continually approach a variety of subjects and impact their behavior. They often fly or run away. Some disturbance is unavoidable. The trick is to minimize it.
3-Never enter legally closed areas.
4-Do not trespass on private property.
5-Learn, be aware of, and do not break any local, state, or federal laws, regulations, or ordinances.
All in all, it seems pretty simple to me.