index - a numerical scale used to compare variables with one another or with some reference number. 1  margin of error, margin of safety, safety margin - the margin required in order to insure safety; in engineering the margin of safety is the strength of the material minus the anticipated stress.
Nutty Ways to Celebrate Squirrel Appreciation Day This Year. SQUIRRELS! Whether you love them or loathe them, National Squirrel Appreciation Day, January 21st, is a great time to take a few moments and learn about these nutty animals. If you count flying squirrels we have 10 tree species in North America.
Do squirrels eat flowers? Quick Answer. Yes, squirrels eat flowers. Although most species of squirrel prefer seeds such as acorns, walnuts, sunflower seeds and pine cone seeds, they have been known to eat fruits, vegetables and flowering plants when these seeds are unavailable or scarce.