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File:Occurrence-of-twin-embryos-in-the-eastern-bluebird-peerj-02-273-g001.jpg

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English: On 17 June 2013, an eastern bluebird (Sialia sialis) nest was observed containing one relatively large egg (bottom right) and three normal-sized eggs in State College, Pennsylvania.
Date
Source Image file from Bailey R, Clark G (2014). "Occurrence of twin embryos in the eastern bluebird". PeerJ. DOI:10.7717/peerj.273. PMID 24688852. PMC: 3961165.
Author Bailey R, Clark G
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11 March 2014

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Date/TimeThumbnailDimensionsUserComment
current01:26, 29 August 2014Thumbnail for version as of 01:26, 29 August 2014708 × 944 (255 KB)Recitation-botAutomatic upload of media from: doi:10.7717/peerj.273