Probably in a 1-1.5 block radius.
no not at all in fact Vancouver is far to warm for polar bears to roam.
As far as hunting the Lynx is primarily a night hunter. It will also roam and hunt during the day but prefers the evening and nights.
no you cannot
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cats can travel around 6-8 miles a day or even further!
If your cat has not been spayed and is in heat, then yes, it is very possible that she could come back pregnant. Intact male cats roam far and wide to seek out intact female cats whom are in heat. Some female cats have "silent" heats, which give no sign until it is too late. It is best to spay your cat as soon as possible to limit the risk of pregnancy and transmitted diseases such as Feline immunodeficiency virus (feline version of HIV).
By definition, visibility in a blizzard is 1/4 mile or less.
To my knowledge, the sense of smell requires that an odor MUST be inhaled in order to sense [or "smell"] it. Therefore, cats, dogs, humans, etc., cannot smell past the entrance of their noses. There is no distance in the ability to smell. On the other hand, among animals, there is a distinct difference in the sensitivity of their abilities to detect minute odors, and this part of the answer is outside of my knowledge, and hopefully will be added when an expert improves this answer.
As far as the wild cats will allow
Cats, like humans, can mate at any time day or night.
If they are my cats.. all the time, and far too often around me.
As far as we know, cats do not think about those kind of things.