When I want to go out of my way (rather than a short walk from home) to see a really good variety, Mystic River Reservation by routes 28 & 16 is my choice. Didn't post about it here because it's outside Cambridge :)

Especially during migration. But all year you'll see herons & swans there.

Here's the bar chart: https://ebird.org/barchart?r=L2477842

Photos: https://media.ebird.org/catalog?regionCode=L2477842 - Click "more" at the bottom, there are a lot. it's a popular spot for birders, so most of those photos are not from me. (Here are my photos from that spot: https://media.ebird.org/catalog?regionCode=L2477842&searchField=user&sort=obs_date_desc&userId=USER554444 )