annotine

from The Century Dictionary.

• noun A tree that bears fruit of two years at the same time, the fruit of the past year persisting, while that of the present year is growing.
• In ornithology, one year old.
• noun A bird which is one year old, or which has molted once.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Zoöl.) A bird one year old, or that has once molted.