Peacock 20th Birthday Card Birthday Card £2.00 Quantity: at £2.00 each Add To Basket These beautiful birthday cards feature a black and white drawing of a peacock with a full peacock feather tale design. The card is size 12cm x 12cm and comes with a white envelope. The cards are left blank inside for your message. There are three species of peacock in the world. The males are peacocks and the females are peahens.