A primary, original research article presents scientific information that includes:
1) review of literature only as related to the research question
2) methodology: includes exact materials and techniques used in the research so the study can be replicated.
3) findings: resulting data represented by graphs, tables, statistics
4) discussion: narrative about the data
5) conclusion: recommendations and future studies
The research is current and specialized in peer-reviewed journals, such as the Journal of Zoology.
Learn how to identify primary research articles (video produced by science librarians at the University of Wisconsin):
Secondary: Summarizes the primary literature. It is often less current and specialized.