I was wondering, does anyone know the rarest mutation of budgie.
And they say the slate blue budgie is a rare mutation and i think i have one but i think i see them everywhere so... are they rare? yes or no?

Slates are rare but because slate is similar to grey you need an expert to identify them properly. Other rare mutations are blackface, coal face, faded, sadleback & anthracite. Lacewings & clearbodies are usually considered fairly rare also

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