Ornithology Commons^™

Birds Not Discouraged, Jessie Maye Smith

Jessie Maye Smith Birds and Watchers Columns Collection

No abstract provided.

Larks, Longspurs, Sparrows Viewed In Winter Home, Jessie Maye Smith

Jessie Maye Smith Birds and Watchers Columns Collection

No abstract provided.

106 Species Recorded In Bird Count, Jessie Maye Smith

Jessie Maye Smith Birds and Watchers Columns Collection

No abstract provided.

Species Count Near 106-Record For 1966, Jessie Maye Smith

Jessie Maye Smith Birds and Watchers Columns Collection

No abstract provided.

Factors Determining Great Blue Heron Rookery Movement, James M. Kerns, John F. Howe

Journal of the Minnesota Academy of Science

The damaging effect of Great Blue Heron (Ardea herodias) excrement on nest trees was determined by observation and Hellige-Truog soil analysis methods. In large heronries high chemical concentrations kill nest trees and result in movement of heronry boundaries to o live tree area.

The Common Goldeneye Duck And The Role Of Nesting Boxes In Its Management In North-Central Minnesota, Leon L. Johnson

Journal of the Minnesota Academy of Science

Evaluation of use of nesting boxes of two kinds by the common goldeneye duck (Bucephala clangula americana) in a wooded area of north-central Minnesota, where these ducks are fairly abundant, shows 69 to 80 percent of the usable boxes were eventually used. Wooden boxes were better accepted than metal boxes, but the latter provided greater protection from predators. Calculations from band recoveries indicate a hunting bag of about 36 percent for birds during their first year. This is a high rate of harvest, especially since goldeneyes do not breed until their second year. After the first year, however, mortality is …

Birds Get Share In Holidays, Jessie Maye Smith

Jessie Maye Smith Birds and Watchers Columns Collection

No abstract provided.

The Indian Crow, John L. Long

Journal of the Department of Agriculture, Western Australia, Series 4

THE Indian crow occasionally reaches the shores of Australia from southern Asia via ships travelling between Indian and Australian ports.

Nebraska Bird Review (January 1967) 35(1), Whole Issue

Nebraska Bird Review

Table of Contents

1966 (Forty-first) Spring Migration and Occurrence Report ... 2

Addition to 1965 Fall Record Report ... 22

1966 Fall Field Day ... 22

1966 Winter Meeting ... 22

Notes ... 23

In Memoriam—George W. Keim ... 24

—William G. Youngworth ... 24

Subspecies And Ecology Of Meadowlarks In Northwest Arkansas, Robert Lowery, Earl L. Hanebrink

Journal of the Arkansas Academy of Science

No abstract provided.

Sympatry Changes And Hybridization Incidence In Mallards And Black Ducks, Paul A. Johnsgard

Papers in Ornithology

Changes in general fall and winter distributions of Mallards and Black Ducks over the past century have resulted in markedly increased sympatric contact during pair formation between these two forms, and have been responsible for increased opportunities for hybridization. Bureau of Sport Fisheries and Wildlife records of hybrids from 34 states indicate a minimal current hybridization rate that is about 4% of the frequency expected on the basis of mating according to mathematical probabilities of chance contact. Thus, hybridization is most frequent where both forms are almost equally abundant, indicating that no reinforcement of differences reducing hybridization in the primary …