Complex sentence: The Morelet's Tree Frog was abundant within its range and were kept as pets internationally, however it is currently listed as critically endangered on the IUCN Red List as of 2001 because of habitat destruction and disease.
Split into simpler sentences: The Morelet's Tree Frog was abundant within its range and were kept as pets internationally. However it is currently listed as critically endangered on the IUCN Red List as of 2001 because of habitat destruction and disease.