As soon as I got out of the car, big lens and tripod in tow, sentries were taking up positions to monitor my every move, and if need be alert their fellows with high-pitched squeaking beeps. I had planned on shooting and watching the animals for perhaps an hour. That plan ultimately elongated into three hours. For most of these images, I had my camera down nearly to the ground, and often had to wait for a half-hour or more in one position before the squirrels overcame their concerns with me and began to move around.
Habitat is considerably different, too. Chipmunks are forest species, and ground squirrels - at least all that I have seen in Ohio - shun woodlands and occupy wide-open spaces. They are closely related to prairie dogs and act the part. It's thought that the squirrels expanded eastward with the bison, probably during the last Xerothermic Period, which was about 5,000 to 8,000 years ago. Herds of bison are major game-changers when it comes to habitat manipulation, and they created vast open shortgrass plains perfect for the squirrels. While the bison are long gone, the squirrels persist, usually inhabiting human-maintained short grass haunts such as airports, golf courses, and cemeteries.
These beasts are furry Rip Van Winkles, and I'd bet they'll be down in the tunnels for the winter this week. Probably only the jumping mice rival them for extended hibernation, at least in this part of the world. With the coming of consistently cool weather, in October, they retreat to the burrows and don't emerge until April. A squirrel's normal active respiratory rate is up to 200 breaths a minute; when in hibernation mode that'll slow to about a breath every five minutes.
However, when a threat looms, they're quick to race (8 mph bursts!) to a nearby hole. This can work to the photographer's advantage. When I would see one drop into a burrow, I'd quickly scramble into a good nearby position, partially concealed by a headstone if possible, and with the light to my back. After a few minutes, the squirrel would stick its head above ground. It would remain like that for several minutes, surveying its surroundings.
It took the fellow in the photo above a minute or two to finish his meal, and I did not realize what he (could be a she, I don't know how to tell) had until I reviewed my photos later.