intraspecific vs intraspecies

intraspecific and intraspecies both are adjectives.

Word	Noun	Adjective	Verb	Adverb
intraspecific	No	Yes	No	No
intraspecies	No	Yes	No	No

As adjectives, intraspecific and intraspecies are synonyms defined as:

intraspecific and intraspecies: arising or occurring within a species; involving the members of one species

intraspecific (adjective)	intraspecies (adjective)
arising or occurring within a species; involving the members of one species	arising or occurring within a species; involving the members of one species