My grandparents had something very similar on cassette... no tidbits even, just, "1234, Greater Spotted Swallow [birdcall]" (the numbers referring to an accompa

My grandparents had something very similar on cassette... no tidbits even, just, "1234, Greater Spotted Swallow [birdcall]" (the numbers referring to an accompanying book). My sister and I must have spent listened to those two tapes dozens of times.