Hi Vixen.
As Sdaji has said not all elapids "hood" but quite a few do and in particular the larger elapids. Unlike Sdaji the many Common Browns (Pseudonaja textilis) I have encountered over the years, although not as spectacular as some others of the same genus or like Red Bellied Blacks or Tigers, have tended to "hood" either upright in a threat display or just generally when provoked.
Another species that doesn't get a lot of mention but also has an impressive hood display is the Spotted Black Snake (Pseudechis guttatus)
A couple of pics below. The pic of the Brown isn't that good but does show the snake "Hooding"
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Pseudechis guttatus - Spotted Black (Warrialda NSW)
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Pseudonaja Textilis - Eastern Brown (Inverell NSW)