I've been waiting to get a picture of some sheep for a while so that I can share an amazing fact I learned recently.
The reason that groups of birds and sheep are both called flocks is that sheep used to have wings and could fly. It was their main defence against predators. Over time they lost their wings and their feathers changed to wool.
Early christians adopted the lamb of god because of the animals ability to accend to the heavens.
You learn something new every day.