If you leaped onto an electric fence would I be right in assuming you wouldn't get electrocuted as long as you don't provide a path for the charge to neutralize itself?
humans have considerably more body capacitance than birds...roughly 100 pF
A human body is effectively a conductor, so this might act as one plate of a capacitor. The dielectric may be air or a pair of insulated boots and the other plate may be the ground or the return wire of the electric fence.
It is not reasonable to claim a person would have 100 pF to ground unless you knew the exact situation
As the fence will not be monitored (I assume) you could just Earth it to a stake in the ground, temporarily, then pull out the stake when you're over / through it. That's the Engineer's solution - not the Physicist's.
Or you could wear a Faraday Suit or learn to pole vault.
btw, cjameshuff, don't you mean that birds would have lower capacitance?