Yes, it's called leucism, partial whiteness to the plumage, not to be confused with albinism which is all white plumage and reddish pink eyes and soft tissues.
From: David Gusakov <[log in to unmask]>
To: [log in to unmask]
Sent: Wed, Oct 14, 2020 10:20 am
Subject: [VTBIRD] question
Today in the usual flock of juncos on our lawn was one whose head was
pure white on top. Every other feature was as normal.
Is there a name for this anomaly? Any info appreciated.