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The Alfred Grewe Papers consists of approximately 6,200 photographic 35 mm color slides (with scanned copies) depicting St. Cloud State University classroom and field studies from the 1960s to the 1990s. The slides were scanned by Grewe's former student Mary Stefanski.

In addition to several sets of classroom lectures on key subject matter of his SCSU courses, the image collection includes a significant component of Grewe's’s research with bald eagles. He was one of the first to document the status and habits of eagles prior to their endangered species listing in 1967. As part of this work, Grewe was one of the first to suggest that chemicals in the environment were likely responsible for the critical thinning of eagle egg shells, a major cause of the inability of these birds to reproduce at a rate sufficient to sustain an already much diminished population.

Grewe was also a preeminent authority on American white pelicans, initiating and leading the world’s longest running pelican banding study at Marsh Lake in Lac Qui Parle Wildlife Management Area near Appleton, Minnesota. Here he documented the breeding colony’s rise from two pairs to over 20,000, the largest American white pelican colony in the world for many years.

Other topics documented by the images here include sandhill cranes, owls of various species, great blue herons and other colonial nesting waterbirds, etc. Many wildlife species are depicted, including from his many graduate students' research / theses topics. Images portray Grewe or his students conducting “wildlife work” such as capturing and banding birds, working hunter check stations, conducting radio telemetry, etc. and overviews of habitat restoration practices from Federal wildlife refuges and State wildlife management areas. Several of the previous Grewe students shown in the collection became prominent names in the wildlife arena in future years, something Grewe gave him more pride than anything else he had accomplished.

Original text written on the slides was primarily from Grewe himself. However, many (if not most) of the slides have no written information on them.

The digital scans are organized and named as such (as written by Mary Stefanski):

The image file names include the following format: Group, Slide Number, and any Information written on the slide. Any dates, names, etc. within ( ) were not written on the original slide and were added for clarification from the date printed or embossed on the slide when it was developed. For example: Crex Birds IMAG0065 Injured Cooper Hawk (Owen Schmidt 1971). The original slide can be found within the larger collection in the Crex Meadows Birds folder in slot 65 and contains the writing “Injured Cooper Hawk.” (Owen Schmidt 1971) was added to the electronic file name based on the identification of Owen and the date, 1971, stamped on the cardboard slide holder.

Includes Birds Stack 2, Birds Stack 3, Birds Stack 4

Includes Cranes Stack 1, Cranes Stack 2

Includes Crex Meadows - Birds, Crex Meadows - Management and Prairie Flowers, Crex Meadows - Pothole Creation and Birds, 1979

Includes Deer Lecture, Deer Study Grand Rapids 1975, Deer Yard and Other Deer, Deer Yard Stack 1

Includes Duck Banding 1960s, Wood Duck - Nest Boxes and Habitat

Includes Eagle Pack 1, Eagle Pack 2, Eagle Pack 3

Includes Eagle Talk with Scanned Notes, Eagles in Yankton, South Dakota 1970s, Gold Eagles Wyoming 1979, Thrune, Eagle and Heron

Includes Canada Geese 1970s, Goose Species, Snow Geese 2000, Snow Geese and Swans 1960s, Raptor Lecture, Redtail Hawk

Includes Heron and Egret Lecture, Heron Colony and Eagle Nest, Sartell, Pre Highway 15 Bridge 1980s, Heron Talk with Notes, Herons and Egrets Stack 1

Includes Herons and Egrets Stack 2

Includes Mammal Stack 1

Includes Barred Owls, Sartell, MN (Grewe's Yard) 1988, Great Gray Owl Pack 1, Great Grey Owls Steve Loch 1979-1980, Hawk Owl 1980s-1990s

Owls Stack 1, Owls Stack 2

Pelican Banding 1970s-1980s, Pelican Banding 1970s-1990s, Pelican Banding 1990s, Pelican Dominique Braud Copyright 1996, Pelicans 1, Pelicans 2, Pelicans 3, Pelicans 4, Pelicans 1985, Pelicans, Food, Brady Becker

Includes Wildflowers

Includes Prairie Chicken in Minnesota by Svedarsky and Weiland 1985, Prairie Chicken Presentation, Prairie Chickens, Prairie Grouse 1974

Includes Rx Fire - November 1980, Rx Fire, Agassiz National Wildlife Refuge - April 1989

Includes Sherburne NWR - 1990, 1991, Sherburne NWR - Miscellaneous Management, Aerials, Prairie Planting - 1980s, Sherburne NWR - Rx Fire, Turkeys, Spring Waterfowl - 1980s-1990