Laima Heydrich Picture

According to Baltic mythology swallows brought fire on Earth cause they flight to heavens and they touched to fire with their tails and that's why they have V-shaped tails.

About Laime from wiki
Laima (also Laime, Laimas māte in Latvian) was the personification of fate and luck in the Latvian and Lithuanian mythologies. She was associated with childbirth, marriage, and death; she was also the patron of pregnant women. Laima and her functions are identical to the Hindu goddess Lakhsmi.
Continue Reading: The Fates