I am afraid not.
Crop milk is a semi-solid, crumbly excretion high in fat and protein that some bird species feed to baby birds during the first days after hatching. It is a secretion from the crop of parent birds.
This crop milk is only found in pigeons and doves [Columbidae].
Flamingos [ Phoenicopteridae] and the male emperor penguin [Aptenodytes forsteri] are producing something similar but this is a secretion from the esophagus.
Cockatiels [Nymphicus hollandicus]or Agapornis species have neither.