easily seen

Khalid said she saw a legal observer with the National Lawyers Guild — wearing a neon green hat to be easily seen observing police activity — shoved to the ground by an officer.

They were easily seen mixed in once the stadium was filled.

Insect populations are difficult to measure - their small frames means they cannot wear trackers, and some, like dragonflies, cannot be easily seen as they do not swarm like birds.

"Unlike visible light that can be easily seen by the eye, THz light is challenging to detect," said Gao.

It is not easily seen and is often clear, making a black road surface visible underneath.