Watch the Bird Song online guitar lesson by Jeff McErlain from Essentials: Chord Tone Soloing
With this and every tune we approach, I suggest playing through the chord progression using as many different chord voicings as you can. In this performance, I'm very often just outlining those shapes. By familiarizing yourself with those shapes, it's very easy to start thinking about chord tones.
Of course, at some point you want to make sure you know what all those notes are, but as we know, that takes a lot of work. However, we can start right away by thinking shapes. The overall pentatonic scale we can use on this song is in D minor, but as we can see, this doesn't cover all the chords. The second chord in the song is Bb7, so right there we have some great options. For that chord, I'm just outlining the chord by playing its root, Bb. Another song that's fun to jam over is Jeff Beck's "Come Dancing" that just repeats these two chords.