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GENERAL:
This dataset includes two files; "camera trap data.txt" and "snow cover camera traps.txt".


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"camera trap data.txt"
This is a dataset of collected by nine below-snow camera traps (using custom-made Reconyx cameras, described in detail by Soininen et al). Camera traps had a movement sensor, and for each trigger event three images were taken. Only image number one has been scored by observers. Image contents were scored in the program MapViewTM(Reconyx).


COLUMN TITLES:
"Image_Name": image name as recorded by the camera traps
"Location": Camera trap ID
"Trigger": identifies images one to three per trigger event 
"Date": Date
"Time": time
"Temp_C" temperature degrees Celcius recorded by camera trap
"Comment": comments recorded by observers
"Bird": number of birds recorded per image
"Vole": number of voles recorded by image
"Stoat": number of stoats recorded by image
"Shrew": number of shrews recorded by image
"Shrew_vole": numberof small mammals per image when voles and shrews could not be distinguished from each other
"Quality": quality score of image; 0= good qualtiy, 1 = poor quality due to snow or humidity, 2= good quality but no animal seen, 3= poor quality due to sunshine (strong black and white contrast)


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"Snow cover camera traps.txt"
Additional data on the snow cover status of the camrea traps. Camera trap status was checked three times, and snow cover/exposure to air recorded every time. 

COLUMN TITLES:
"Trap": Camera trap ID
Columns "February 23", "March 16" and "April 18" denote whether the trap in question was exposed to air or covered by snow at these dates. 
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