According to a recent study (based on the 2010 world population of 6.9 billion) by The Pew Forum, there are: 1  2,173,180,000 Christians (31% of world population), of which 50% are Catholic, 37% Protestant, 12% Orthodox, and 1% other. 2  1,598,510,000 Muslims (23%), of which 87-90% are Sunnis, 10-13% Shia.
Look for the distinctive male Hazelnut flowers, called catkins, which look like 2-inch to 3-inch long yellow or brown growths at the end of the tree branches. The male flowers grow in clusters of two to three and typically form in the winter months. 1  6.
The hazel (Corylus) is a genus of deciduous trees and large shrubs native to the temperate Northern Hemisphere. The genus is usually placed in the birch family Betulaceae, though some botanists split the hazels (with the hornbeams and allied genera) into a separate family Corylaceae. The fruit of the hazel is the hazelnut.