Simplify the following text for a Grade 13 native English-speaking person.
Original: The Short-beaked Echidna has been included in several postal issues : it was one of four native species to appear on Australian postage stamps in 1974 , where it was the 25 cent stamp ; it appeared on a 37 cent stamp in 1987 , and again in 1992 when it was on the 35 cent stamp .
Simplified: The Short-beaked Echidna has been included in several postal issues : it was one of four native species to appear on Australian postage stamps in 1974 , when it was on the 25-cent stamp ; it appeared on a 37-cent stamp in 1987 , and in 1992 it was on the 35-cent stamp .