Yesterday was a work day, so I didn't get into the park till 4pm. In one short stroll I saw the wren checking for grub under leaves, the water thrush bathing and grub-hunting and one sweet ruby crowned kinglet. Still waiting to see more warblers. They're coming.
There are a lot of people in the park with powerful lenses, but the lens is not the answer to successful pictures. It's essential to know the birds. Buying a good camera and a costly lens does not make a person a "professional photographer". The professionals concentrate on what they're observing. It is impolite to interrupt. There are want-to-bes who intrude, ask technical questions in the most inappropriate time. To every want-to-be, first do your own homework. Professional photographs willingly share information, but within reason and at the right time. While working is not the right time.