Until 2011 I didn't know any other than the Black-backed jackal in the Kruger. However late in the afternoon in early December, we had just turned off the tarred road heading north onto the S144 (Tropic af Capricorn loop) when a jackal type animal ran across the road. It obviously wasn't a Black-backed jackal and we thought it was possibly a domestic dog which had somehow entered the park. Talking with other people we came to the conclusion it must have been a Side-striped jackal. It moved so quickly I wasn't able to get a photograph. Reading the forum I noted that they been seen in that area so thought it was just a lucky sighting.
In early December last we were at Timbavati picnic area talking with some people who said that they had just seen a Side-striped jackal on their way down from Balule, so I told them they were very lucky to see one. We left and headed back to Satara and just before we reached the camp what I believe was a Side-striped jackal ran across the road in front of us, but again I was unable to take a photograph, so can't be certain.
Later we were staying at Berg-en-Dal and had just left the camp on our last day in the park and were feeling a bit miserable. We were heading towards the main road when a jackal ran across the road just before the turning to Malelane camp. I thought that it was a Side-striped, but wasn't certain, however this time I did manage to take a couple of photographs of the animal although it was about 5:30 and still fairly dark - hence the poor quality of the images. On our return home I checked with the forum and realised that the key ID pointer was the colour of the tip of the tail and how pleased I was when checking my photographs that it was indeed WHITE.
Perhaps they are more widespread than I thought, but just difficult to see and photograph.