The fibonacci sequence (0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, …) is displayed in many forms of nature. The ‘golden circle’ made from the sequence can be seen in shells and in the centre of sunflowers.
Bees also hatch according to the sequence; if an unfertilised egg is laid the queen bee, it hatches a drone (male) but if the egg is fertilised, it will always hatch a worker (female). So drones only ever have one parent, and worker bees always have two.
You can view a beautiful video on the Fibonacci Sequence in nature below.