In some cultures, a brown or tan colored butterfly symbolizes a new life or a fresh start.
Seeing a brown butterfly also mean there is good news or important news soon to come your way. If a brown butterfly enters the house it means that an important letter or message will arrive soon.
Some believe that when a brown (or white) butterfly enters the house it is the spirit or soul of a deceased loved one from the distant past. It can also mean that the actual soul of the individual is nearby.
Some say that if a brown butterfly flies into your home, that it can be the spirit of a loved one coming to warn you ahead of time about some unlucky event or misfortune that could occur; in general, it may mean to be extra cautious for the next few days.
If the first butterfly of the season you see happens to be brown, it can indicate misfortune; practice extra positive thinking and be extra careful at this time.
One myth says that if a brown butterfly enters and flies around the house, that great fortune will befall the owner of the house.
In many cultures, especially in Filipino superstition, a brown butterfly would represents money soon to come your way. If it lands on you it will bring extra good luck.
Likewise, if a green or brown butterfly flies inside and around the house, great fortune will befell on the owner of the house. The color green and brown signify bills and money.
In parts of Eastern Europe it is believed that brown butterflies can be a bad omen, or may mean that bad news is on its way.