жук-олень означает в английский

stag beetle▼(large beetle in Lucanidae)
noun
[UK: stæɡ ˈbiːt.l̩] [US: ˈstæɡ ˈbiːt.l̩]

stag-beetle▼(a large black beetle with a pair of strong mandibles)
noun
[UK: ˈstæɡ.ˌbiːtl] [US: ˈstæɡ.ˌbiːtl]