German paste

With great care it (a young woodpecker) was fed, and eventually reared on such soft food as liver (generally chopped up), German-paste, and fruit not too hard, and became very tame, readily coming to the hand which fed it, darting out its long tongue directly anything was presented, as well as drinking with it, and climbing up me as if I was a tree.

1901, John Henry Gurney, “Ornithological notes from Norfolk”, in The Zoologist, volume 4th series, vol 5, number 718, page 128/129