Changes in Breeding Bird Populations in North Dakota: 1967 to 1992-93
We compared breeding bird populations in North Dakota using surveys conducted in 1967 and 1992-93. In decreasing order, the five most frequently occurring species were Horned Lark (Eremophila alpestris), Brown-headed Cowbird (Molothrus ater), Western Meadowlark (Sturnella neglecta), Red-winged Black...
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1997
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ftunivnebraskali:oai:digitalcommons.unl.edu:usgsnpwrc-1028 2024-09-15T18:04:53+00:00 Changes in Breeding Bird Populations in North Dakota: 1967 to 1992-93 Igl, Lawrence Johnson, Douglas 1997-01-01T08:00:00Z application/pdf https://digitalcommons.unl.edu/usgsnpwrc/31 https://digitalcommons.unl.edu/context/usgsnpwrc/article/1028/viewcontent/Igl_AUK_1997_Changes_in_breeding.pdf unknown DigitalCommons@University of Nebraska - Lincoln https://digitalcommons.unl.edu/usgsnpwrc/31 https://digitalcommons.unl.edu/context/usgsnpwrc/article/1028/viewcontent/Igl_AUK_1997_Changes_in_breeding.pdf United States Geological Survey, Northern Prairie Wildlife Research Center: Publications Other International and Area Studies text 1997 ftunivnebraskali 2024-09-02T07:48:18Z We compared breeding bird populations in North Dakota using surveys conducted in 1967 and 1992-93. In decreasing order, the five most frequently occurring species were Horned Lark (Eremophila alpestris), Brown-headed Cowbird (Molothrus ater), Western Meadowlark (Sturnella neglecta), Red-winged Blackbird (Agelaius phoeniceus), and Eastern Kingbird (Tyrannus tyrannus). The five most abundant species-Horned Lark, Chestnut-collared Longspur (Calcarius ornatus), Red-winged Blackbird, Western Meadowlark, and Brown-headed Cowbird-accounted for 31-41% of the estimated statewide breeding bird population in the three years. Although species composition remained relatively similar among years, between year patterns in abundance and frequency varied considerably among species. Data from this survey and the North American Breeding Bird Survey indicated that species exhibiting significant declines were primarily grassland- and wetland-breeding birds, whereas species exhibiting significant increases primarily were those associated with human structures and woody vegetation. Population declines and increases for species with similar habitat associations paralleled breeding habitat changes, providing evidence that factors on the breeding grounds are having a detectable effect on breeding birds in the northern Great Plains. Text Eremophila alpestris University of Nebraska-Lincoln: DigitalCommons@UNL |
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University of Nebraska-Lincoln: DigitalCommons@UNL |
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Other International and Area Studies |
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Other International and Area Studies Igl, Lawrence Johnson, Douglas Changes in Breeding Bird Populations in North Dakota: 1967 to 1992-93 |
topic_facet |
Other International and Area Studies |
description |
We compared breeding bird populations in North Dakota using surveys conducted in 1967 and 1992-93. In decreasing order, the five most frequently occurring species were Horned Lark (Eremophila alpestris), Brown-headed Cowbird (Molothrus ater), Western Meadowlark (Sturnella neglecta), Red-winged Blackbird (Agelaius phoeniceus), and Eastern Kingbird (Tyrannus tyrannus). The five most abundant species-Horned Lark, Chestnut-collared Longspur (Calcarius ornatus), Red-winged Blackbird, Western Meadowlark, and Brown-headed Cowbird-accounted for 31-41% of the estimated statewide breeding bird population in the three years. Although species composition remained relatively similar among years, between year patterns in abundance and frequency varied considerably among species. Data from this survey and the North American Breeding Bird Survey indicated that species exhibiting significant declines were primarily grassland- and wetland-breeding birds, whereas species exhibiting significant increases primarily were those associated with human structures and woody vegetation. Population declines and increases for species with similar habitat associations paralleled breeding habitat changes, providing evidence that factors on the breeding grounds are having a detectable effect on breeding birds in the northern Great Plains. |
format |
Text |
author |
Igl, Lawrence Johnson, Douglas |
author_facet |
Igl, Lawrence Johnson, Douglas |
author_sort |
Igl, Lawrence |
title |
Changes in Breeding Bird Populations in North Dakota: 1967 to 1992-93 |
title_short |
Changes in Breeding Bird Populations in North Dakota: 1967 to 1992-93 |
title_full |
Changes in Breeding Bird Populations in North Dakota: 1967 to 1992-93 |
title_fullStr |
Changes in Breeding Bird Populations in North Dakota: 1967 to 1992-93 |
title_full_unstemmed |
Changes in Breeding Bird Populations in North Dakota: 1967 to 1992-93 |
title_sort |
changes in breeding bird populations in north dakota: 1967 to 1992-93 |
publisher |
DigitalCommons@University of Nebraska - Lincoln |
publishDate |
1997 |
url |
https://digitalcommons.unl.edu/usgsnpwrc/31 https://digitalcommons.unl.edu/context/usgsnpwrc/article/1028/viewcontent/Igl_AUK_1997_Changes_in_breeding.pdf |
genre |
Eremophila alpestris |
genre_facet |
Eremophila alpestris |
op_source |
United States Geological Survey, Northern Prairie Wildlife Research Center: Publications |
op_relation |
https://digitalcommons.unl.edu/usgsnpwrc/31 https://digitalcommons.unl.edu/context/usgsnpwrc/article/1028/viewcontent/Igl_AUK_1997_Changes_in_breeding.pdf |
_version_ |
1810442491743174656 |