We're lucky too here in Norfolk UK. Very varied habitat (fields, coast, wetlands, rivers & lakes, woodlands etc) means we have an excellent selection of bird species. Skylarks are often heard in the fields, but (according to Norfolk Wildlife Trust, of which I'm a member) they have declined in numbers by 50% due, as Steve says above, to intensive farming methods. We have many nature reserves here in Norfolk though where they are safe, which is lovely.

I sat on a straw bale at the edge of a field last Spring enjoying the total and utter silence, then a skylark began to sing high in the sky. It really brought tears to my eyes. (I'm a daft old thing)

Sorry keberoxu, none of this is any help to you in US.