That is what they do at the nature center I visit. Bird watchers can just sit, watch and listen. I would love to hear that all of the time at my house and yet I live in an apartment and not a house that I own. I kind of make my myself a little crazy though trying to figure out the song and who is singing into the microphone. Some I know automatically like chicadees, white breasted nuthatch, blue jays, cardinals, crows flying overhead, scolding well fed squirrels at the foot of the feeders and more...
Then I pounce upon the people in nearby chairs and take them from their blissful, bird meditation by asking "what was that? who is singing now? what bird is that?....their answers are always "I don't know". Ok really the bird watching neighbors are usually nice and solicitous!
Which birds do you hear the most I wonder?!
* laughs like crow, soars like eagle with vision of hawk, haunts like loon & lulls like nuthatch ....tickle tickle, feather has most powerful medicine of all...makes you laugh *