Complex sentence: The IUCN lists the western clawed frog as "Least Concern" because it has a wide distribution and is an adaptable species living in a range of habitats, and the population trend seems to be steady.
Split into simpler sentences: The IUCN lists the western clawed frog as being of "Least Concern". This is because it has a wide distribution and is an adaptable species living in a range of habitats and the population trend seems to be steady.