Trees Provide Habitat for Wildlife. It is only natural that wherever trees are planted, wildlife and other plants are sure to follow. Trees provide shelter and food for a variety of birds and small animals, such as squirrels and beavers.
The only real medical reason you could be unusually tired during your period is if you have anemia, which is an iron deficiency. For some women who are anemic and have a very heavy period, the first day can be a doozy. However, this group is in the minority.
This is one of the signs of being pregnant that is a pretty clear indicator. There may of course also be other reasons for a missed period, such as stress or if you have been on a very extreme exercise regimen. Morning Sickness. Another sign of being pregnant is nausea or so-called morning sickness.