The phrase "particular species" refers to a specific type or kind of organism in the animal or plant kingdom. It emphasizes that we are talking about a specific group of animals or plants, not just any random type. Full definition
In this place, you can find very particular species of fish and turtles. (wildlifeconnection.com)
There are great similarities and as the development occurs we each branch off into our own particular species at a certain point. (religion.blogs.cnn.com)
Without knowing why scientists choose particular species, model organism research can appear frivolous — and some creatures scientists choose to study may even seem disgusting. (genestogenomes.org)