40. These little creatures build their nest on a window sill of a house in a spanish village. The owner of the house, Daniel Carbajal Solsona, followed the work of these 2 birds each day for about 2 months. He was fascinated to notice that the birds worked around 8-10 hours per day, 6 days a week, but on Sunday they rested and didn’t bring to their nest any straw. This species of birds, among other species like turtle doves and pigeons, have a social behavior and are named “the birds of God”. They form lifetime pairs and in case one dies or disappears, the other one doesn’t “restore its life”, being able to distinguish good and evil.