After meandering for an hour about fields, streams and forests, I often see nothing — or the equivalent: only juncos, aptly named, or common sparrows.

Juncos and mourning doves came and sat there every morning, and, when the seed ran out, I bought more.

“Certainly, there’s plenty of research showing that anonymity allows for freer expression,” said Rey Junco, a professor of education and human-computer interaction.