rare bird

n.

稀有的人或物，珍品；珍禽；

Rare bird
RARE BIRD
Rare Bird
Defensible secrecy, a very rare bird.
Defensible secrecy, a very rare bird
The Hawai'i rare bird search 1994-1996
Primary aldosteronism: Rare bird or common cause of secondary hypertension?
Enterococcus avium splenic abscess: a rare bird.
Bare ground as a crucial habitat feature for a rare terrestrially foraging farmland bird of Central Europe
The influence of habitat fragmentation on genetic diversity of a rare bird species that commonly faces environmental fluctuations
A low false negative filter for detecting rare bird species from short video segments using a probable observation data set-based EK...
Multiple lines of evidence support the recognition of a very rare bird species: the Príncipe thrush
A low false negative filter for detecting rare bird species from short video segments using a probable observation data set-based EK...