This case study explores undergraduate students' ideas about, behaviors regarding, experiences with, and application of information literacy (IL) concepts and how they apply these understandings in their own research processes. Students from an undergraduate Honors Thesis Preparation course completed a pre- and post-questionnaire in which they described their behaviors and thoughts about engaging in the information ecosystem, their research processes in both informal and formal contexts, what they consider when searching for information, where they search for information, and the challenges and successes experienced. Students also submitted copies of key assignments completed while developing research proposals for the course, such as research journals, presearch videos, and final research proposals. Responses from the questionnaires were analyzed to better understand how students describe their experiences regarding IL concepts. The themes that emerged from students' responses on the questionnaires were then used to understand how well students applied their articulated understandings in their research project. In general, students know how to determine and find particular types of sources to fit their information needs, navigate the information ecosystem in both open-ended and strategic manners as they narrow their focus, and evaluate the authority of sources based on basic criteria, such as credibility and publication process. Analysis of individual student's data revealed nuanced differences in how they engage in the IL ecosystem, which are discussed throughout. The results of this case study highlight that students, both through informal contexts and academic contexts, exhibit many qualities of IL learners outlined in the "Framework for Information Literacy for Higher Education" (ACRL, 2015). Implications of these results on future development of IL curricula are also discussed. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]