have eyes like a hawk
To be very observant. (Like all birds of prey, hawks have excellent vision.) Mom has eyes like a hawk, so she'll definitely notice if you sneak some of those cookies out of the kitchen.
have eyes like a hawk
miss nothing of what is going on around you.have eyes like a ˈhawk
be able to notice or see everything: Mrs Fielding’s bound to notice that chipped glass. The woman has eyes like a hawk! ▶ ˌhawk-ˈeyed adj. A hawk is a kind of bird of prey (= a bird that kills other creatures for food), and can see small things from very far away.