It was believed that on this romantic day, birds found their mates. This belief is still cherished by love struck people all over the world. The sweet little blue coloured lovebirds have come to signify that belief. It is said that the lovebirds can't live without their mates. Dove, in the Christian belief signifies purity, meekness and innocence. Hence, these two birds have become the most endearing symbols of the spirit of valentine day.