Birdsongs of the Mesozoic is a musical group founded in Boston, Massachusetts in 1980.

The music of Birdsongs of the Mesozoic is almost entirely instrumental, and incorporates many different musical elements; critic Rick Anderson writes, "Very few bands have ever managed to straddle the worlds of modern classical music and rock as successfully as this one did." [1] In his liner notes for their Beat of the Mesozoic EP, Boston rock critic Eric Van dubbed them "the world's hardest-rocking chamber music quartet." Another memorable description came from Jim Sullivan of the Boston Globe: "classical-punk-jazz-car-wreck music."