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.

Materials document travels during sabbatical to destinations that include: South Pacific Islands, New Zealand, Australia, Indonesia, Philippines, Thailand, Cambodia, Nepal, India, Middle East, Kenya, Uganda, Madagasscar, Tanzania, the Comoros, and Mauritius.

Materials document travels during sabbatical including destinatios such as: Italy, Germany, Spain, Morocco, Portugal, Canary Islands, Brazil, Argentina, Paraguay, Chile, Peru, Afghanistan, Pakistan, India, Nepal, Thailand, and Hong Kong.

Materials document travels during sabbatical to destinations that include: folder 3 contains reports from Namibia; folder four covers Chile, Argentina, Paraguay, Uruguay, Easter Island, Bolivia, and Peru.

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.