Here are pictures of all the WAP-4 locomotives I spotted in Yesvantpur Jn. on Sunday. As I had posted phone that day, there were four different WAP-4 engines from four different sheds: one from Vijayawada, one from Itarsi, one from Lalaguda, and one from Santragachi. There was also a WAP-7 from Royapuram.
I have also added some photographs of WAP-4 attached to the Yesvantpur Howrah Express rake being pulled into the station by a WDG-3A.