He produced a CD of songs about or mentioning birds some years ago, "Birds in folk song" with 20 tracks on.
I thought of him again this morning when a skein of pink-footed geese flew over our house.
He used to tell the tale of being out with a bunch of lads, hearing the geese going overhead and telling them that the geese flying over were pink-footed geese. "Blimey, you've got good eyesight!".

Robin