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Summary
DescriptionTamias striatus (eastern chipmunk) (Newark, Ohio, USA) (33864949338).jpg |
"Thief Baggins" - stuffing cheeks with dropped bird seed. Tamias striatus (Linnaeus, 1758) - eastern chipmunk in Newark, Ohio, USA. (photo by Mary Ellen St. John) Mammals are the dominant group of terrestrial vertebrates on Earth today. The group is defined based on a combination of features: endothermic (= warm-blooded), air-breathing, body hair, mother's milk, four-chambered heart, large brain-to-body mass ratio, two teeth generations, differentiated dentition, and a single lower jawbone. Almost all modern mammals have live birth - exceptions are the duck-billed platypus and the echidna, both of which lay eggs. Mammals first appear in the Triassic fossil record - they evolved from the therapsids (mammal-like reptiles). Mammals were mostly small and a minor component of terrestrial ecosystems during the Mesozoic. After the Cretaceous-Tertiary mass extinction at 65 million years ago, the mammals underwent a significant adaptive radiation - most modern mammal groups first appeared during this radiation in the early Cenozoic (Paleocene and Eocene). Three groups of mammals exist in the Holocene - placentals, marsupials, and monotremes. Other groups, now extinct, were present during the Mesozoic. Eastern chipmunks are native to eastern America and parts of southern and southeastern Canada. Classification: Animalia, Chordata, Vertebrata, Mammalia, Rodentia, Sciuridae See info. at: <a href="https://en.wikipedia.org/wiki/Eastern_chipmunk" rel="noreferrer nofollow">en.wikipedia.org/wiki/Eastern_chipmunk</a> |
Date | |
Source | Tamias striatus (eastern chipmunk) (Newark, Ohio, USA) |
Author | James St. John |
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/33864949338 (archive). It was reviewed on 10 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
10 December 2019
Captions
Items portrayed in this file
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some value
29 April 2019
0.003125 second
5.8
144.6 millimetre
160
image/jpeg
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 01:48, 10 December 2019 | ![]() | 1,652 × 1,324 (3.03 MB) | Ser Amantio di Nicolao | Transferred from Flickr via #flickr2commons |
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Metadata
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot SX40 HS |
Exposure time | 1/320 sec (0.003125) |
F-number | f/5.8 |
ISO speed rating | 160 |
Date and time of data generation | 12:06, 29 April 2019 |
Lens focal length | 144.6 mm |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop Elements 16.0 (Macintosh) |
File change date and time | 10:19, 30 April 2019 |
Exif version | 2.3 |
Date and time of digitizing | 12:06, 29 April 2019 |
Shutter speed | 8.3128829536528 |
APEX aperture | 5.0721057884232 |
Exposure bias | 0 |
Maximum land aperture | 5.0721057884232 APEX (f/5.8) |
Metering mode | Pattern |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 16,393.442622951 |
Focal plane Y resolution | 16,393.442622951 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Standard |
IIM version | 19,084 |
Date metadata was last modified | 06:19, 30 April 2019 |
Rating (out of 5) | 0 |
Unique ID of original document | uuid:0E3B859DDC6AE91182C4911504307A91 |
Copyright status | Copyright status not set |