I could find that the Bennet's Woodpecker does have the behaviour of re-using or stealing holes. On Wikipedia it's only very briefly mentioned, but the large Robertson's book may have something on it. [1]
Still looking for more information on what kind of holes the Hoopoe uses or makes; perhaps I was rather thinking of the Bennet's.
Still looking for more information on what kind of holes the Hoopoe uses or makes; perhaps I was rather thinking of the Bennet's.
https://en.wikipedia.org/wiki/Bennett%27s_woodpecker