Momento Monty Python - 3

Tourist: Those are sheep, aren't they?
Shepherd: Yeh.
Tourist: Hmm, thought they were. Only, what are they doing up in the trees?
Shepherd: A fair question and one that in recent weeks has been much on my mind. It´s my considered opinion that they're nestin'.
Tourist: Nesting?
Shepherd: Aye.
Tourist: Like birds?
Shepherd: Exactly. It's my belief that these sheep are labourin' under the misapprehension that they're birds. Observe their be'aviour. Take for a start the sheeps' tendency to hop about the field on their be'ind legs. Now witness their attempts to fly from tree to tree. Notice that they do not so much fly as... plummet.
Tourist: Yes, but why do they think they're birds?
Shepherd: Another fair question. One thing is for sure, the sheep is not a creature of the air.They have enormous difficulty in the comparatively simple act of perchin'. Trouble is, sheep are very dim. Once they get an idea in their 'eads, there's no shiftin' it.
Tourist: But where did they get the idea?
Shepherd: From Harold. He's the most dangereous of creatures, a clever sheep. He's realized that a sheep's life consists of standin' around for a few months and then bein' eaten. And that's a depressing prospect for an ambitious sheep.
Tourist: Well, why don't you just remove Harold?
Shepherd: Because of the enormous commercial possibilities if he succeeds.