This series is comprised of notes, manuscripts, reports, and other material created and or used by Jaeger in his professional work as a biologist who specialized in desert ecology. Materials primarily pertain to plants, animals, and the geographic landscapes that Jaeger studied. A selection of directories and membership lists from various organizations that Jaeger was affiliated with are also included in this series.

This series is comprised of notes, manuscripts, reports, and other material created and or used by Jaeger in his professional work as a biologist who specialized in desert ecology. Materials primarily pertain to plants, animals, and the geographic landscapes that Jaeger studied. A selection of directories and membership lists from various organizations that Jaeger was affiliated with are also included in this series.