User blog comment:Legionwrex/Speculation on Reapers./@comment-31.19.101.40-20120521151231

A T-Rex wouldn't be much effective either. Their arms are too short, the legs are massive but need to be balanced by the tail. It is more likely that the purpose of their appearance was to look like an insect. Probably, the first galaxy races looked like insects: remember the Keepers!