Two mules for sister sarah ...

[drivin_me_nuts]

I rather like this piece of music (in fact at the moment I play it as I nod off in bed), but something is bugging me...

Can someone please tell me what are the instruments that together make the braying of the mules. In this clip, from about 2:10 onwards.

Much appreciated.

https://www.youtube.com/watch?v=m-O9gBADNHQ