[Tweeters] Cedar Waxwing odd behavior

[dgrainger at birdsbydave.com]

Two visitors to our birdbath about noon Aug 8th were Cedar Waxwings. 
What was unusual was that one sat in the water and did the "feed me feed 
me" posture, addressing another on the rim. The begging bird had 
juvenile coloration on chest and the adult red blaze on secondary 
feathers! Is this a normal thing for a juvenile transitioning that far 
into adulthood to still be begging food? (Port Townsend, WA, up on 
Castle Hill area)