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,{"id":5222466,"text":"5222466 - 1949 - The season--November-December 1948","interactions":[],"lastModifiedDate":"2012-02-02T00:15:41","indexId":"5222466","displayToPublicDate":"2010-06-16T12:18:17","publicationYear":"1949","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2687,"text":"Maryland Birdlife","active":true,"publicationSubtype":{"id":10}},"title":"The season--November-December 1948","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Maryland Birdlife","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","usgsCitation":"Robbins, C., 1949, The season--November-December 1948: Maryland Birdlife, v. 5, no. 1, p. 8-10.","productDescription":"8-10","startPage":"8","endPage":"10","numberOfPages":"3","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":199711,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"5","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a5fe4b07f02db6344f3","contributors":{"authors":[{"text":"Robbins, C.S.","contributorId":53907,"corporation":false,"usgs":true,"family":"Robbins","given":"C.S.","email":"","affiliations":[],"preferred":false,"id":336341,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
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,{"id":5220137,"text":"5220137 - 1949 - Ecology of a nesting red-shouldered hawk population","interactions":[],"lastModifiedDate":"2012-02-02T00:15:09","indexId":"5220137","displayToPublicDate":"2010-06-16T12:18:17","publicationYear":"1949","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3783,"text":"The Wilson Bulletin","printIssn":"0043-5643","active":true,"publicationSubtype":{"id":10}},"title":"Ecology of a nesting red-shouldered hawk population","docAbstract":"An ecological study of a nesting Red-shouldered Hawk population was made over a 185 square mile area on the Coastal Plain of Maryland in 1947. The courting and nesting season extended from late February until late June.....During the nesting season a combination of fairly extensive flood-plain forest with adjacent clearings appears to meet the major ecological requirements of the Red-shouldered Hawk in this region. A total of 51 pairs was found in the study area, occupying about 42 square miles or 23% of the total area studied. The population density on the land that was suitable for this species was about 1 pair per .8 of a square mile, while the density for the entire study area would be only about 1 pair per 3.6 square miles.....Nests were spaced fairly evenly over most of the flood-plain forests, especially in areas where the width.of the flood plain was relatively constant. There was an inverse correlation between the width of the flood plain and the distances between nests in adjacent territories. The nests were all situated in fairly large trees and were from 28 feet to 77 feet above the ground, averaging 50. They were found in 14 different species of trees, all deciduous.....The Barred Owl and Red-shouldered Hawk were commonly associated together in the same lowland habitats. Other raptores were all largely restricted to upland habitats....The average number of young in 47 occupied nests following the hatching period was 2.7 with extremes of 1 and 4. Only 3 out of 52 nests (6%) were found deserted at this time....The food habits of nestling Red-shouldered Hawks are very diversified. They feed on many types of warm-blooded and cold-blooded vertebrates as well as invertebrates.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Wilson Bulletin","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","usgsCitation":"Stewart, R.E., 1949, Ecology of a nesting red-shouldered hawk population: The Wilson Bulletin, v. 61, no. 1, p. 26-35.","productDescription":"26-35","startPage":"26","endPage":"35","numberOfPages":"10","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":196370,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":16580,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://elibrary.unm.edu/sora/Wilson/v061n01/p0026-p0035.pdf","linkFileType":{"id":1,"text":"pdf"}}],"volume":"61","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a4be4b07f02db625d7d","contributors":{"authors":[{"text":"Stewart, R. E.","contributorId":93426,"corporation":false,"usgs":true,"family":"Stewart","given":"R.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":331389,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":5223039,"text":"5223039 - 1949 - Birds of the season","interactions":[],"lastModifiedDate":"2012-02-02T00:15:35","indexId":"5223039","displayToPublicDate":"2010-06-16T12:18:17","publicationYear":"1949","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3793,"text":"Wood Thrush","active":true,"publicationSubtype":{"id":10}},"title":"Birds of the season","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Wood Thrush","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","usgsCitation":"Robbins, C., 1949, Birds of the season: Wood Thrush, v. 4, no. 6, p. 232-233.","productDescription":"232-233","startPage":"232","endPage":"233","numberOfPages":"2","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":201645,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"4","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a2ae4b07f02db61251f","contributors":{"authors":[{"text":"Robbins, C.S.","contributorId":53907,"corporation":false,"usgs":true,"family":"Robbins","given":"C.S.","email":"","affiliations":[],"preferred":false,"id":337728,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":5222968,"text":"5222968 - 1949 - Birds of the season","interactions":[],"lastModifiedDate":"2012-02-02T00:14:50","indexId":"5222968","displayToPublicDate":"2010-06-16T12:18:17","publicationYear":"1949","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3793,"text":"Wood Thrush","active":true,"publicationSubtype":{"id":10}},"title":"Birds of the season","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Wood Thrush","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","usgsCitation":"Robbins, C., 1949, Birds of the season: Wood Thrush, v. 4, no. 3, p. 107-108.","productDescription":"107-108","startPage":"107","endPage":"108","numberOfPages":"2","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":196799,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"4","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a29e4b07f02db6116d7","contributors":{"authors":[{"text":"Robbins, C.S.","contributorId":53907,"corporation":false,"usgs":true,"family":"Robbins","given":"C.S.","email":"","affiliations":[],"preferred":false,"id":337590,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":5220311,"text":"5220311 - 1949 - Distribution of North American birds","interactions":[],"lastModifiedDate":"2012-02-02T00:14:33","indexId":"5220311","displayToPublicDate":"2010-06-16T12:18:17","publicationYear":"1949","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":935,"text":"Audubon Field Notes","active":true,"publicationSubtype":{"id":10}},"title":"Distribution of North American birds","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Audubon Field Notes","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","usgsCitation":"Robbins, C., 1949, Distribution of North American birds: Audubon Field Notes, v. 3, no. 6, p. 262-264.","productDescription":"262-264","startPage":"262","endPage":"264","numberOfPages":"3","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":193958,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"3","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a7fe4b07f02db648778","contributors":{"authors":[{"text":"Robbins, C.S.","contributorId":53907,"corporation":false,"usgs":true,"family":"Robbins","given":"C.S.","email":"","affiliations":[],"preferred":false,"id":331609,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":5220310,"text":"5220310 - 1949 - Summary of Maryland nest records, 1949","interactions":[],"lastModifiedDate":"2012-02-02T00:14:33","indexId":"5220310","displayToPublicDate":"2010-06-16T12:18:17","publicationYear":"1949","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2687,"text":"Maryland Birdlife","active":true,"publicationSubtype":{"id":10}},"title":"Summary of Maryland nest records, 1949","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Maryland Birdlife","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","usgsCitation":"Robbins, C., 1949, Summary of Maryland nest records, 1949: Maryland Birdlife, v. 5, no. 4, p. 41-48.","productDescription":"41-48","startPage":"41","endPage":"48","numberOfPages":"8","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":193957,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"5","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b04e4b07f02db6994ed","contributors":{"authors":[{"text":"Robbins, C.S.","contributorId":53907,"corporation":false,"usgs":true,"family":"Robbins","given":"C.S.","email":"","affiliations":[],"preferred":false,"id":331608,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":5220304,"text":"5220304 - 1949 - Wilson's warbler in Maryland in late December","interactions":[],"lastModifiedDate":"2017-06-07T13:00:08","indexId":"5220304","displayToPublicDate":"2010-06-16T12:18:17","publicationYear":"1949","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3544,"text":"The Auk","onlineIssn":"1938-4254","printIssn":"0004-8038","active":true,"publicationSubtype":{"id":10}},"title":"Wilson's warbler in Maryland in late December","docAbstract":"<p>On December 22, 1947, while participating in a Christmas Bird Count on the eastern shore of Maryland, I observed a Wilson's warbler (<i>Wilsonia pusilla</i>) feeding along a sunny margin of a woods near the Pocomoke River, three miles north of Snow Hill. It was with a flock of myrtle warblers (<i>Dendroica coronata</i>), white-throated sparrows (<i>Zonotrichia albicollis</i>), Carolina chickadees (<i>Parus carolinensis</i>), and several other species. My attention was first attracted to the Wilson's warbler by the distinctive call note which it repeated about once a minute. The bird was actively feeding among the dead leaves on a group of young oak trees. The bird was collected and proved to be a female. The skin was preserved for the collection of the Fish and Wildlife Service. The stomach was full, and the contents were identified by Robert T. Mitchell as: fragments of Araneida, 80 per cent; Coleoptera, 10 per cent; Hymenoptera, 10 per cent. </p>","language":"English","publisher":"American Ornithological Society","doi":"10.2307/4080465","usgsCitation":"Robbins, C., 1949, Wilson's warbler in Maryland in late December: The Auk, v. 66, no. 2, p. 207-208, https://doi.org/10.2307/4080465.","productDescription":"2 p.","startPage":"207","endPage":"208","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":480441,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.2307/4080465","text":"Publisher Index Page"},{"id":193823,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"66","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e49dbe4b07f02db5e0f68","contributors":{"authors":[{"text":"Robbins, C.S.","contributorId":53907,"corporation":false,"usgs":true,"family":"Robbins","given":"C.S.","email":"","affiliations":[],"preferred":false,"id":331602,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":5223022,"text":"5223022 - 1949 - Birds of the season","interactions":[],"lastModifiedDate":"2012-02-02T00:15:40","indexId":"5223022","displayToPublicDate":"2010-06-16T12:18:17","publicationYear":"1949","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3793,"text":"Wood Thrush","active":true,"publicationSubtype":{"id":10}},"title":"Birds of the season","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Wood Thrush","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","usgsCitation":"Robbins, C., 1949, Birds of the season: Wood Thrush, v. 5, no. 1, p. 28-29.","productDescription":"28-29","startPage":"28","endPage":"29","numberOfPages":"2","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":200093,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"5","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a29e4b07f02db611ad0","contributors":{"authors":[{"text":"Robbins, C.S.","contributorId":53907,"corporation":false,"usgs":true,"family":"Robbins","given":"C.S.","email":"","affiliations":[],"preferred":false,"id":337697,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":5223036,"text":"5223036 - 1949 - Birds of the season","interactions":[],"lastModifiedDate":"2012-02-02T00:15:35","indexId":"5223036","displayToPublicDate":"2010-06-16T12:18:17","publicationYear":"1949","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3793,"text":"Wood Thrush","active":true,"publicationSubtype":{"id":10}},"title":"Birds of the season","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Wood Thrush","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","usgsCitation":"Robbins, C., 1949, Birds of the season: Wood Thrush, v. 4, no. 5, p. 200-201.","productDescription":"200-201","startPage":"200","endPage":"201","numberOfPages":"2","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":201701,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"4","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a4ce4b07f02db626bf5","contributors":{"authors":[{"text":"Robbins, C.S.","contributorId":53907,"corporation":false,"usgs":true,"family":"Robbins","given":"C.S.","email":"","affiliations":[],"preferred":false,"id":337724,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":5222548,"text":"5222548 - 1949 - State-wide bird count, May 7, 1949","interactions":[],"lastModifiedDate":"2012-02-02T00:15:33","indexId":"5222548","displayToPublicDate":"2010-06-16T12:18:17","publicationYear":"1949","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2687,"text":"Maryland Birdlife","active":true,"publicationSubtype":{"id":10}},"title":"State-wide bird count, May 7, 1949","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Maryland Birdlife","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","usgsCitation":"Robbins, C., 1949, State-wide bird count, May 7, 1949: Maryland Birdlife, v. 5, no. 5, p. 62-63.","productDescription":"62-63","startPage":"62","endPage":"63","numberOfPages":"2","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":201561,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"5","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b32e4b07f02db6b4426","contributors":{"authors":[{"text":"Robbins, C.S.","contributorId":53907,"corporation":false,"usgs":true,"family":"Robbins","given":"C.S.","email":"","affiliations":[],"preferred":false,"id":336489,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
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