It depends on how hard the bite was! Usually 1-2hrs
The redness from a deer fly bite can last anywhere from a few hours to a day or two. Some people react differently to bites and take longer to recover from them.
A few hours.
No longer than 3 or 4 days.
Black fly bite was unique. It left one third millimeter size blood where it took my blood. After about 15 hrs(?), I developed a red 5 millimeter diameter circle on the site. After 3 days, I still have the red circle. But the strength has weakened. I guess the redness will disappear in a week or so? What I'm worried is that the black fly carries parasites primarily in Africa or the middel Eastern countries. Does it possibly carry parasites in the States too? Could have I gotten some shot at the bite site so that the possible parasites could have been killed?
Only a few days but the harder you bite down the longer it hurts
Your phrasing is extremely vague. If you want to ask how vampires bite humans, they are thought to have long sharp teeth, which are good at biting.
Dr. Jerry Balentine's quote: "The black widow is about a half-inch long and symptoms of bite include abdominal pain, ... The bites of very large spiders such as tarantulas can be painful." I think it would take a long time.
as long as they can hold their breath
No time at all.
I had a bite mark (aka:love bite) that lasted nearly 6 months.... It just would not go away. It was quite embarrassing but I guess the area that it was located was fairly soft skin.
Maybe about 1 day or 2. If not even that. It would be freezing out and if i last that long i would be coming it the house with frost bite all over me.
Pregnancy last from 38-40 weeks.