Have a Tappy?? Hop on front seat with no driver, whistle attack (using the LB+down or whatever it is) your Tappy will take flight and pursue, whistle passive when you get close, put a tranq or two into it, whistle attack again, tranq, rinse and repeat, just be sure not to hit your tap, you'll have infinite Stam so you can chase indefinitely and once you get good you can even get yourself on the side or even underneath for easy aiming...
... Having said that. It is still a pain to do solo