Lawrence Igl, PhD (Former Employee)
Science and Products
Filter Total Items: 121
Records of northern mockingbird, Mimus polyglottos, occurrences in North Dakota during the Twentieth Century Records of northern mockingbird, Mimus polyglottos, occurrences in North Dakota during the Twentieth Century
The Northern Mockingbird (Mimus polyglottos) is a common bird in the southern United States that has been expanding its breeding range into the northern United States and southern Canada. During the twentieth century, there were 128 reports of Northern Mockingbird occurrences in North Dakota, including 106 reports during the breeding season (15 April to 31 August) and 22 during the...
Authors
L.D. Igl, R.E. Martin
Effects of management practices on grassland birds: Nelson's Sharp-tailed Sparrow Effects of management practices on grassland birds: Nelson's Sharp-tailed Sparrow
Information on the habitat requirements and effects of habitat management on grassland birds were summarized from information in more than 5,500 published and unpublished papers. A range map is provided to indicate the relative densities of the species in North America, based on Breeding Bird Survey (BBS) data. Although birds frequently are observed outside the breeding range indicated...
Authors
Jill A. Dechant, Marriah Sondreal, Douglas Johnson, Lawrence Igl, Christopher M. Goldade, Paul Rabie, Betty R. Euliss
Effects of management practices on grassland birds: Lesser Prairie-Chicken Effects of management practices on grassland birds: Lesser Prairie-Chicken
Information on the habitat requirements and effects of habitat management on grassland birds were summarized from information in more than 4,000 published and unpublished papers. A range map is provided to indicate the breeding distribution of Lesser Prairie-Chicken in the United States and southern Canada. Although birds frequently are observed outside the breeding range indicated, the...
Authors
Brent Jamison, Jill A. Dechant, Douglas Johnson, Lawrence Igl, Christopher M. Goldade, Betty R. Euliss
On the rarity of observations of food provisioning by male dickcissels On the rarity of observations of food provisioning by male dickcissels
Males of polygynous bird species typically provide less parental care to their offspring than males of monogamous species (Ketterson and Nolan 1994). Generally, in polygynous species, a male forfeits some potential reproductive success if he shifts his reproductive effort from mating with multiple females to parental care (Trivers 1972, Gubemick et al. 1993, Schleicher et al. 1993). In...
Authors
L.D. Igl, Louis Best
Area requirements of grassland birds: A regional perspective Area requirements of grassland birds: A regional perspective
Area requirements of grassland birds have not been studied except in tallgrass prairie. We studied the relation between both species-occurrence and density and patch size by conducting 699 fixed-radius point counts of 15 bird species on 303 restored grassland areas in nine counties in four northern Great Plains states. Northern Harrier (Circus cyaneus), Sedge Wren (Cistothorus platensis)...
Authors
Douglas Johnson, Lawrence Igl
Effects of management practices on grassland birds: Vesper Sparrow Effects of management practices on grassland birds: Vesper Sparrow
Information on the habitat requirements and effects of habitat management on grassland birds were summarized from information in more than 5,500 published and unpublished papers. A range map is provided to indicate the relative densities of the species in North America, based on Breeding Bird Survey (BBS) data. Although birds frequently are observed outside the breeding range indicated...
Authors
Jill A. Dechant, Meghan F. Dinkins, Douglas Johnson, Lawrence Igl, Christopher M. Goldade, Betty R. Euliss
Science and Products
Filter Total Items: 121
Records of northern mockingbird, Mimus polyglottos, occurrences in North Dakota during the Twentieth Century Records of northern mockingbird, Mimus polyglottos, occurrences in North Dakota during the Twentieth Century
The Northern Mockingbird (Mimus polyglottos) is a common bird in the southern United States that has been expanding its breeding range into the northern United States and southern Canada. During the twentieth century, there were 128 reports of Northern Mockingbird occurrences in North Dakota, including 106 reports during the breeding season (15 April to 31 August) and 22 during the...
Authors
L.D. Igl, R.E. Martin
Effects of management practices on grassland birds: Nelson's Sharp-tailed Sparrow Effects of management practices on grassland birds: Nelson's Sharp-tailed Sparrow
Information on the habitat requirements and effects of habitat management on grassland birds were summarized from information in more than 5,500 published and unpublished papers. A range map is provided to indicate the relative densities of the species in North America, based on Breeding Bird Survey (BBS) data. Although birds frequently are observed outside the breeding range indicated...
Authors
Jill A. Dechant, Marriah Sondreal, Douglas Johnson, Lawrence Igl, Christopher M. Goldade, Paul Rabie, Betty R. Euliss
Effects of management practices on grassland birds: Lesser Prairie-Chicken Effects of management practices on grassland birds: Lesser Prairie-Chicken
Information on the habitat requirements and effects of habitat management on grassland birds were summarized from information in more than 4,000 published and unpublished papers. A range map is provided to indicate the breeding distribution of Lesser Prairie-Chicken in the United States and southern Canada. Although birds frequently are observed outside the breeding range indicated, the...
Authors
Brent Jamison, Jill A. Dechant, Douglas Johnson, Lawrence Igl, Christopher M. Goldade, Betty R. Euliss
On the rarity of observations of food provisioning by male dickcissels On the rarity of observations of food provisioning by male dickcissels
Males of polygynous bird species typically provide less parental care to their offspring than males of monogamous species (Ketterson and Nolan 1994). Generally, in polygynous species, a male forfeits some potential reproductive success if he shifts his reproductive effort from mating with multiple females to parental care (Trivers 1972, Gubemick et al. 1993, Schleicher et al. 1993). In...
Authors
L.D. Igl, Louis Best
Area requirements of grassland birds: A regional perspective Area requirements of grassland birds: A regional perspective
Area requirements of grassland birds have not been studied except in tallgrass prairie. We studied the relation between both species-occurrence and density and patch size by conducting 699 fixed-radius point counts of 15 bird species on 303 restored grassland areas in nine counties in four northern Great Plains states. Northern Harrier (Circus cyaneus), Sedge Wren (Cistothorus platensis)...
Authors
Douglas Johnson, Lawrence Igl
Effects of management practices on grassland birds: Vesper Sparrow Effects of management practices on grassland birds: Vesper Sparrow
Information on the habitat requirements and effects of habitat management on grassland birds were summarized from information in more than 5,500 published and unpublished papers. A range map is provided to indicate the relative densities of the species in North America, based on Breeding Bird Survey (BBS) data. Although birds frequently are observed outside the breeding range indicated...
Authors
Jill A. Dechant, Meghan F. Dinkins, Douglas Johnson, Lawrence Igl, Christopher M. Goldade, Betty R. Euliss