Verb
select or gather, especially those that are good examples of their kind
Scientists have concluded that culling bat populations will not stop white-nose syndrome, a fungal pathogen that is wiping out the species, from spreading.
Adjective
being effective without wasting time or effort
The Great White, one of the most feared predators on earth, is an incredibly efficient hunter. Scientists have yet to understand the drive behind their feeding behavior.
Noun
careful observation or examination, especially in a critical way
Coyotes have managed to elude much serious scrutiny by being exquisitely wary, so much so that even dedicated coyote scientists struggle to find ways to lay eyes on them.