FEATHER
COLOUR aberrations in birds have been my main research for more than 35 years. Besides breeding experiments with budgies, canaries and especially pigeons and doves, much of my research is also based on aberrant-coloured specimens kept in many museum collections.
Over the years, and as I recorded every bird with aberrant white feathers I found labelled in collections as “Partial Leucistic”, I had an uneasy feeling that I was overlooking something. Almost all these birds had white feathers randomly scattered throughout their plumage. Some had
