The Brown Tree Snake has a large head with eyes that are large and protruding with vertical pupils. The head is distinct from the narrow neck. They are brown above with ragged-edged, darker crossbands on the back and sides (eastern Australia). Northern Australian specimens are cream with bold reddish bands. The belly is cream to orange. This snake grows to 2 m. Midbody scale rows 19–23, ventrals 225–265; anal single; subcaudals divided 85–130.
