Blue elves (Photographed in Pinggu Wetland Park) Blue Elf (Photographed in Pinggu Wetland Park) Blue Elf (Photographed in Pinggu Wetland Park) Blue Elf (Photographed in Pinggu Wetland Park) Blue Elf (Photographed in Pinggu Wetland Park) Blue Elf (Photographed in Pinggu Wetland Park) Blue Elf (Photographed in Pinggu Wetland Park) Blue Elf (Photographed in Pinggu Wetland Park) Blue Elf (Photographed in Pinggu Wetland Park) Blue Elf (Photographed in Pinggu Wetland Park)