Observations (undated)

Obstetrics Pen Study

Pen #1 Chronology Summary (1974)

Observations (undated)

Observations Pen #2 (6/4/1974)

Observations Pen #2 (5/28/1974)

Male - Type B Sonograms

Observations (4/4/1974)

Observations Pen #2 (5/2/1974)

Observations Pen #2 (5/5/1974)

Observations Pen #2 (5/7/1974)

Observations Pen #2 (5/9/1974)

Observations Pen #2 (5/11/1974)

Observations Pen #2 (5/12/1974)

Observations Pen #2 (5/13/1974)

Observations Pen #2 (5/14/1974)

Observations Pen #2 (5/16/1974)

Observations Pen #2 (5/20/1974)

Observations Pen #2 (5/22/1974)

Observations Pen #2 (5/24/1974)

Clutch-Size Determination in Anatidae by Scott R. Derrickson (March 1972)

Observations Pen #1 (4/21/1974)

Observations Pen #1 (4/23/1974)

Observations Pen #1 (4/25/1974)

Observations Pen #1 (4/27/1974)

Observations Pen #1 (4/28/1974)

Observations Pen #1 (4/30/1974)

Observations Pen #1 (5/2/1974)

Observations Pen #1 (5/4/1974)

Observations Pen #1 (5/6/1974)

Observations Pen #1 (5/8/1974)

Observations Pen #1 (5/10/1974)

Observations Pen #1 (5/12/1974)

Observations Pen #1 (5/15/1974)

Observations Pen #1 (5/17/1974)

Observations Pen #1 (5/19/1974)

Observations Pen #1 (5/21/1974)

Observations Pen #1 (5/23/1974)

Observations Pen #1 (5/26/1974)

Observations (undated)

Observations Pen #1 (5/29/1974)

Observations Pen #1 (5/31/1974)

Observations Pen #1 (6/5/1974)

Observations (undated)

Bird Call Recordings - Notes

Physical Characteristics of Bird Vocalizations

Adaptations to Colony Life on Cliff Ledges: A Comparative Study of Guillemot and Razorbill Chicks (Reprint)

Kuk Calls and Preflight

Vocalization Manuscript - Anas acuta

Male Burp-Whistle Vocalizations

Duckling Calls

Repulsion

Calls of Incubating Females

Persistent Quacking

Female Inciting

Female Decrescendo

Male Whee Calls - PF, etc.

Male Grunt-Whistle

Pintail Vocalizations - Literature Summary

Staccato Notes

Whooping Cranes

Notes on Incubated Hens Hatching

Pond Survey - Use Data (1973)

Duck Census (1973)

Mobility of Breeding Pintails - Manuscript

Equipment Purchases - NSF GW Teal Project (1976)

Pen Copulations (1973-1974)

Field Bearing and Observation Record - Medina Project (May-July 1973)

Some Nutritional Aspects of Reproductions in Prairie Nesting Pintails (Reprint)

Nest Chronology (1971-1973)

Captive Pintail IDs (1975)

Brood Survey Summary - Pintail (1971-1973)

Male-Male Chases (1973-1974)

Social Courtship (1973-1974)

The Evolution of Duck Displays (Reprint)

Male-Female Chases (1973-1974)

Rape Attempts (1973-1974)

Vocalizations of the Mallard (Reprint)

GWT Pens

Mr. Fixit (1977)

Feeding Ecology (Reprint)

Bird Photographs

Birds Under Consideration (1984)

Birds - Haves and Have Nots (1973-1980)

Bird Watching Notebook (1979-1980)

Bird Call Graphs

Notebooks (1974-1975 and undated)

CRC Facility Images (8/30/1978)

Duck Pond, Bird Enclosures, and Related Images - Prints

Duck Pond, Bird Enclosures, and Related Images - Negatives

Hand-Rearing of a Tawny Frogmouth Chick Hatched January 31, 1977 at the National Zoo - Slides

Cassowary - Slides

Gizzard Contents, Rothschild's Mynah Chart - Slides (1978)

Bufflehead and Aartlaub's Models - Slides (1978)

Front Royal Birds - Slides

Miscellaneous Waterfowl - Slides (1961-1969)

Fall Foliage/Ducks - Slides (1968-1969, 1978)