A circle projecting a double diamond thunderbolt placed above the lotus is the National Emblem of Bhutan. There are two dragons on the either sides and jewels on all the sides. Lotus represents purity; the thunderbolts harmony between secular and religious power and the jewels signifies sovereign power. The dragons on the either side, a male and a female, represent the name of the country. (Druk means dragon and for the Bhutanese, Bhutan is known as Druk yul or the Land of the Dragon).
The National Flag of Bhutan
The rectangular national flag is diagonally divided into two parts with a white dragon on the divide. The upper half is yellow and the lower saffron-orange. The upper half signifies the secular power and authority of the king. The lower half represents the practice of religion and power of the Buddhism. The white dragon signifies the name of the country. The jewels in its claws stand for the wealth and perfection of the country. The national flag on Bhutan was created in 1947 by Mayum Choying Wangmo Dorji. It was later modified in 1956 which took the present shape.
ข้อมูลจาก : http://www.bhutantour.bt/bhutan/national-symbols