How a night of passion between a sheep and a goat led to Lisa the GEEP

Leaping into the air, she looks like something from the funny farm.

But this curious creature is making scientists do a double-take. Meet Lisa the geep... a cross between a goat and a sheep.

She was born after an unscheduled amorous encounter on the farm of Klaus Exsternbrink, in Schwerte, in northern Germany's Ruhr Valley. One of his young billy goats leapt over a fence and had a passionate liaison with a ewe.

The result a month ago was Lisa - resembling a lamb in shape and stature, but with the colouring and agile back legs of a goat.

Her mother seems unfazed by her unusual offspring and has raised her happily so far.