Its eyes are a striking amber color and have an alert and intelligent expression.

The eyes should be very dark, oval in shape, and have an alert and intelligent expression.

Now, it is important to say that an intelligent expression of faith will still convey some sense of uncertainty.

Its eyes are oval with a keen, alert, and intelligent expression.

He wore a confident, intelligent expression on his face, and his manner was no longer rough.

One or two put on intelligent expressions and said, "That's interesting."

White eyebrows, slanting above clear brown eyes, gave the animal an unusually intelligent expression.

He was not a physically impressive individual, but had an alert, intelligent expression ("bright as a hawk").

The eyes are wide set and large with a friendly and intelligent expression.

An intelligent expression came into his eyes and he seemed to understand that something unusual was happening to him or his surroundings.