Grevy's zebra : Whipsnade : 29 May 2014

Male and female Equus grevyi. I believe the male will typically quite often harrass the females, but, in this case, it was the other way around -- this female here spent 10 minutes or so chasing the male around, kicking the air near him, seemingly 'playfully' biting/nibbling, and even mounting him a couple of times.
The male seemed completely disinterested throughout all of this attention, and was eager to get back to grazing again once it had all calmed down.

Nice photo sequence!

Thanks! I figured maybe it captured the behaviour better than a single frame