Here is a short nature clip I shot with the Canon 5D Mark III

Israeli Spring 2014 אביב ישראלי - YouTube

Lenses used:
Canon 16-35 2.8L II
Canon 100 2.8L Macro
Canon 24-105 4.0L IS
Canon 50 1.4

for tracking shots:
Varavon Slider with Motoroid kit