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Articles 1 - 24 of 24
Full-Text Articles in Ornithology
Effects Of Two (Diptera: Culicidae) Mosquito Control Agents On Growth And Reproduction Of Red-Winged Blackbirds (Agelaius Phoeniceus), Joann M. Hanowski, Gerald J. Niemi, Ann R. Lima, Ronald R. Regal
Effects Of Two (Diptera: Culicidae) Mosquito Control Agents On Growth And Reproduction Of Red-Winged Blackbirds (Agelaius Phoeniceus), Joann M. Hanowski, Gerald J. Niemi, Ann R. Lima, Ronald R. Regal
Journal of the Minnesota Academy of Science
We compared red-winged blackbird (Agelaius phoeniceus) reproductive success and nestling growth in 1988 in 10 wetland site treated with methoprene and 10 sites treated with Bacillus thuringiensis israelensis (Bti) to 30 sites that had never received any mosquito (Diptera: culicidae) control treatment. No differences were detected between reference and treatment sites for clutch size, egg volume, growth rates, or fledge weight. The probability that an egg survived to the nestling stage was greater in methoprene-treated than reference sites. No other differences were detected among sites for reproductive success estimated using the Mayfield method. We conclude that treatment of the wetlands …
Breeding Bird Populations In A Proposed Wetland Treatment Area Of Northern Minnesota, Joann M. Hanowski, Gerald J. Niemi
Breeding Bird Populations In A Proposed Wetland Treatment Area Of Northern Minnesota, Joann M. Hanowski, Gerald J. Niemi
Journal of the Minnesota Academy of Science
A census of breeding bird populations was taken in a 40- hectare wetland near Biwabik, Minnesota, prior to the use of this wetland for phosphorus removal from treated wastewater. The wetland was comprised of four distinct habitat types: shrub swamp, black ash (Fraxinus nigra) forest, open coniferous forest, and closed coniferous forest. We used a line transect (about 4 km in length) to document species composition, relative species abundance, and habitat associations of the bird community. A total of816 individuals (mean= 204) and 45 species (mean = 34) were observed during four censuses in June and July, 1985. Two distinct …
Nest Predators And Breeding Birds: Do Initial Vocalizations Correlate With Predator Type And Future Defense Strategy?, Bradley M. Gottfried, Michaela Haug, Kathryn Andrews
Nest Predators And Breeding Birds: Do Initial Vocalizations Correlate With Predator Type And Future Defense Strategy?, Bradley M. Gottfried, Michaela Haug, Kathryn Andrews
Journal of the Minnesota Academy of Science
The initial vocalizations of breeding catbirds in response to predator models positioned at their nests were analyzed to determine if they were correlated with the type of later defense employed (attack model vs. no attack), intensity of defense, and type of predator model (snake vs. blue jay). Statistical differences were found in the types and numbers of vocalizations used in relation to type of nest predator and form of future defense. The data suggest that the initial catbird vocalizations may indeed encode a variety of information.
Recoveries Of Great Horned Owls Banded In Central Minnesota, Robert T. Bohm
Recoveries Of Great Horned Owls Banded In Central Minnesota, Robert T. Bohm
Journal of the Minnesota Academy of Science
Although great horned owls (Bubo virginianus) are often considered permanent residents, data from band returns have shown that movements by this species do occur. In banding activities conducted in central Minnesota from 1967 through 1983, 329 great horned owls were banded and 24 (7.3 percent) recoveries were reported. Twelve of the 24 recoveries (50.0 percent) were made 15 kilometers or more from where the individuals were banded. Five of these recoveries ( 41.7 percent) were to the southeast. Of 23 owls recovered dead, eight (34 .8 percent) were reported only as "found dead," seven (30.4 percent) were found near highways …
Avian Use Of Nest Boxes In Minnesota Farmstead Shelterbelts, Richard H. Yahner
Avian Use Of Nest Boxes In Minnesota Farmstead Shelterbelts, Richard H. Yahner
Journal of the Minnesota Academy of Science
A study of nest box use from November through August by birds in Minnesota farmstead shelterbelts was initiated subsequent to a two-year study showing that cavity-dependent species were absent from shelterbelts during winter and spring. The purpose of the study was to determine use of nest boxes by birds in shelterbelts otherwise devoid of cavities for roosting and nesting purposes. Fifteen of 22 boxes (68%) were used as nest sites in spring and summer by house wrens (Troglodytes aedon) and black-capped chickadees (Parus atricapillus). Neither nested In the shelterbelts before the nest boxes were available. Red-breasted nuthatches (Sitta canadensis) roosted …
Mate And Nest-Site Fidelity Among Tree Swallows In Central Minnesota, Carol Fiedler, Alfred Grewe
Mate And Nest-Site Fidelity Among Tree Swallows In Central Minnesota, Carol Fiedler, Alfred Grewe
Journal of the Minnesota Academy of Science
Movement of tree swallows (lridoprocne bicolor) between successive breeding sites and pair bond formation was analyzed from data collected between 1965 and 1978 in central Minnesota. A lasting pair bond did not seem to exist between breeding pairs. The majority of the breeding pairs were found to separate after one year. Those that did remate usually did so in the same or an adjacent nest box. Age and reproductive success did not appear to affect whether a pair remated or divorced. Movement of the male and female the year following their mating did seem to be a factor. Males tended …
Minnesota Colonial Waterbird Nesting Site Inventory, Carrol L. Henderson
Minnesota Colonial Waterbird Nesting Site Inventory, Carrol L. Henderson
Journal of the Minnesota Academy of Science
Since colonial nesting waterbirds comprise an Important portion of Minnesota's avifauna, it Is important to establish an accurate Inventory of their nesting areas. Knowledge of the status of these species can be used to assess the level of the state's environmental quality. The inventory is also useful in aiding planners and developers so that undesirable impacts on colonies can be avoided or minimized. The Nongame Wildlife Program in the Department of Natural Resources has identified 239 colony sites in Minnesota which are occupied by 16 species. This Inventory process is the first step necessary to carry out future research, management, …
Nesting Ecology Of The Red-Winged Blackbird In North Central Minnesota, Daniel W. Moulton
Nesting Ecology Of The Red-Winged Blackbird In North Central Minnesota, Daniel W. Moulton
Journal of the Minnesota Academy of Science
Reproductive success of a Red-winged Blackbird population nesting in marsh-like habitat In north central Minnesota was estimated. Territorial defense by males began in late April, and nest initiation occurred from mid-May through about mid-July. Nest-starts appeared to be divided into two categories: initial attempts which occurred in late May with a high degree of synchrony, and renesting attempts which occurred from about June 4-July 8, The nesting season lasted only about two months. A minimum of 20 percent of marked females renested on the study area, and others may have renested elsewhere. Three of the six females that renested switched …
Nesting And Brood Rearing Habitat Of The Upland Sandpiper, John C. Dorio, Alfred H. Grewe
Nesting And Brood Rearing Habitat Of The Upland Sandpiper, John C. Dorio, Alfred H. Grewe
Journal of the Minnesota Academy of Science
The upland sandpiper population breeding in Morrison county in central Minnesota was studied in 1975 and 1976. Nests were found in old fields (73 percent), pastures (20 percent), and in a sedge-grass meadow (7 percent). Most nests were discovered in vegetation 22.5 to 35.0 cm tall and on the average were 13.2 m. from an aspen or willow edge. Seven grasses and 23 forbs made up the plant species composition at 14 nest-sites. Brood rearing areas were old fields and over-grazed pastures. Upland sandpipers prefer to feed in vegetation that does not exceed 10 cm.
Waterfowl Production In A Selected Wetland Management Area, Orlo A. Quame, Alfred H. Grewe Jr.
Waterfowl Production In A Selected Wetland Management Area, Orlo A. Quame, Alfred H. Grewe Jr.
Journal of the Minnesota Academy of Science
This study of a Type 5 Federal Wetland Management Area showed that: (1) production (young remaining on the area to flight stage) in birds per acre was 0.74 in 1967 and 0.57 in 1968; (2) the greatest temporary use of the area was mode by blue-winged teal, 64 being sighted at one time; and (3) artificial loafing structures may increase use of a wetland by breeding ducks.
Factors Determining Great Blue Heron Rookery Movement, James M. Kerns, John F. Howe
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
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 …
A Life History Study Of The Yellowthroat, Geothlypis Trichas, P. B. Hofslund
A Life History Study Of The Yellowthroat, Geothlypis Trichas, P. B. Hofslund
Journal of the Minnesota Academy of Science
No abstract provided.
The Hawk Path At Duluth, Pershing B. Hofslund
The Hawk Path At Duluth, Pershing B. Hofslund
Journal of the Minnesota Academy of Science
No abstract provided.
The Relation Of Temperature And Snow Cover To Spring Bird Arrival, Ewart Grove
The Relation Of Temperature And Snow Cover To Spring Bird Arrival, Ewart Grove
Journal of the Minnesota Academy of Science
No abstract provided.
Hiemenz's Study Of The Heron Lake Franklin's Gull Colony, George W. Friedrich
Hiemenz's Study Of The Heron Lake Franklin's Gull Colony, George W. Friedrich
Journal of the Minnesota Academy of Science
No abstract provided.
Daily Light Ration And Gonadal Activity In The English Sparrow, Passer Domesticus, A. R. Ringoen, A. Kirschbaum
Daily Light Ration And Gonadal Activity In The English Sparrow, Passer Domesticus, A. R. Ringoen, A. Kirschbaum
Journal of the Minnesota Academy of Science
No abstract provided.
The Birds Of Minnesota Point, Olga Lakela
The Birds Of Minnesota Point, Olga Lakela
Journal of the Minnesota Academy of Science
No abstract provided.
The Evening Grosbeak In Minnesota, Thomas S. Roberts
The Evening Grosbeak In Minnesota, Thomas S. Roberts
Journal of the Minnesota Academy of Science
No abstract provided.
Notes On The Arrival And Meeting Of Birds In The Vicinity Of Minneapolis For The Spring Of 1887, Franklin Benner
Notes On The Arrival And Meeting Of Birds In The Vicinity Of Minneapolis For The Spring Of 1887, Franklin Benner
Journal of the Minnesota Academy of Science
No abstract provided.
Report Of Ornithology For 1877, P. L. Hatch
Report Of Ornithology For 1877, P. L. Hatch
Journal of the Minnesota Academy of Science
No abstract provided.
Report Of Ornithology, P. L. Hatch
Report Of Ornithology, P. L. Hatch
Journal of the Minnesota Academy of Science
No abstract provided.
Report On Ornithology, P. L. Hatch
Report On Ornithology, P. L. Hatch
Journal of the Minnesota Academy of Science
No abstract provided.
Report On The Birds Of Minnesota, P. L. Hatch
Report On The Birds Of Minnesota, P. L. Hatch
Journal of the Minnesota Academy of Science
No abstract provided.