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Thermal Image Movies- Mammals along Robertson Creek
Click below for movies made by Matina Kalcounis' research group in January and February, 2008.Matina's research is funded by the National Science Foundation, (Grant IOB-0641530; RIG/CAA: Relationship Between Individual Context and Acoustic Structure of Peromyscus Ultrasonic Vocalizations in the Wild).
Matina's research group has deployed a thermal imaging camera high in the trees over Robertson Creek. For movie #1, the camera looks down on the forest and the dark spots are locations of live traps for mice. For movies #2 and #3, this camera looks straight down on the creek the flows through the middle of the scene (left). On each side of the creek are arch-shaped areas that have been washed out by the stream and now are filled with vegetation. The edges of these are steep breaks, about 8' tall, and lead up to nearly level terraces on either side of the creek. The trees and branches are dark (cold); the stream is nearly white (warm).
Movie 1: Mountain Lion (1.1Mb) The lion's feet heat the ground, leaving warm spots that slowly cool. A bat flies through the scene in lower right. The moving line in the upper left is the cable to the camera coming up from the ground.
Movie 2: Mouse and Woodrat (1.9Mb) First
you see a deer mouse moving in the forest (white) and later a larger
wood rat (white) is running around. Notice how they move along sticks
and logs.
Movie 3: Mystery Mammal (790Kb) A mystery
animal shows up. It slinks along, crosses the creek and struggles to
get up the steep edge of the terrace, then moves along the terrace and
out of sight. The stream is about a meter wide. So. What do you think
this could be?
A grey fox?
A ring-tailed cat?
A young mountain lion?
Movie 4: Bobcat (6Mb). On Feb 26, they recorded a bobcat in another location. Notice how this cat moves entirely differently and does not leave warm paw prints...