A year containing an extra day. It has 366 days instead of the normal 365 days. The extra day is added in February, which has 29 days instead of the normal 28 days. Leap years occur every 4 years. 2016 is a leap year and so is 2020. Except that every 100 years special rules apply.
Best Answer: A average life span is about 1 year. Some live only 3 months, but others can live up to a couple of years. The lifespan of the average tick is about two years. Source(s): http://www.nyc.gov/html/doh/html/ehs/ehs... A fly is 3 days so i'm guessing somewhere around the lines of there.
The Rat Terrier life expectancy is about 25 years. Well, the long life span of Rat Terrier will never make you feel lonely and keep your house lively. The average Rat Terrier life span is about 15 - 18 years. With good dog care you can extend the life span of Rat Terrier to over 25 years. Many experts even say the Rat Terrier life expectancy is just 13 to 16 years.