Bat flying in front of the moon (Personalized and Private Mail Stamps 2011)

Stamp Bat flying in front of the moon it reflects the thematic directions:

Bats are flying mammals of the order Chiroptera (/kaɪˈrɒptərə/). With their forelimbs adapted as wings, they are the only mammals capable of true and sustained flight. Bats are more agile in flight than most birds, flying with their very long spread-out digits covered with a thin membrane or patagium. The smallest bat, and arguably the smallest extant mammal, is Kitti's hog-nosed bat, which is 29–34 millimetres (1+1⁄8–1+3⁄8 inches) in length, 150 mm (6 in) across the wings and 2–2.6 g (1⁄16–3⁄32 oz) in mass. The largest bats are the flying foxes, with the giant golden-crowned flying fox (Acerodon jubatus) reaching a weight of 1.6 kg (3+1⁄2 lb) and having a wingspan of 1.7 m (5 ft 7 in).

Halloween or Hallowe'en (less commonly known as Allhalloween, All Hallows' Eve or All Saints' Eve) is a celebration observed in many countries on 31 October, the eve of the Western Christian feast of All Hallows' Day. It is at the beginning of the observance of Allhallowtide,the time in the liturgical year dedicated to remembering the dead, including saints (hallows), martyrs, and all the faithful departed. In popular culture, the day has become a celebration of horror, being associated with the macabre and supernatural.