There are several varieties of crested budgies. The crest factor is dominant. Always mate a crested budgie with a non-crested budgie to avoid the double crest factor which is lethal.
Crested BudgiesTufted Crest - crest extends upward from the top of the cere. (like a cockatiel's crest)
Full Circular Crest - crest extends outward radially from the middle of the head.
Half Circular Crest - crest feathers are in a half-circle and can either extend upward or outward right above the cere.
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