Any of numerous species of American freshwater fishes belonging to the family Centrarchidae.
Any of various sunfishes of the family Centrarchidae, especially the redeye bass (Micropterus coosae).
Either of two subspecies of the copperhead (Agkistrodon contortrix), a venomous pit viper native to the United States: either the broad-banded copperhead or Texas copperhead (Agkistrodon contortrix laticinctus), or the highland moccasin or northern copperhead (Agkistrodon contortrix mokasen).
The redeye tetra (Moenkhausia sanctaefilomenae), a freshwater fish, commonly kept in aquariums, native to South America.
The red-eyed vireo (Vireo olivaceus), a small American songbird.
Redness in the eye(s) of someone in a colour photograph, as an unwanted consequence of light from a flash reflecting off blood vessels in the retina.
A drink made by adding a shot of espresso to a cup of coffee.
An overnight airplane flight.
A strong but poor-quality whiskey.
The red-eyed treefrog (Agalychnis callidryas), which is native to neotropical rainforests.
Redness of the conjunctiva; especially when caused by conjunctivitis (pink-eye).
The common rudd (Scardinius erythrophthalmus), a freshwater fish.
A species of cicada, Psaltoda moerens, native to eastern Australia.
Any of various round herrings of the genus Etrumeus.
Any of various grass-skippers or hesperiid butterflies of the genus Matapa.
A drink consisting of beer with tomato juice.
Often followed by it: to travel on a red-eye (“an overnight airplane flight”).