Ever heard of Kruger's Big Birding weekends? ... That will give perspective to you regarding what can be achieved from a drive primarily geared to birding.
And BTW, a BBW probably packs in 6 to 8 hours of expert-guided bird viewing during the hours of darkness! (Not to mention the 16 hours plus during daylight) And that at extremely affordable prices...
I also have to emphasise what a number of contributors to this thread have already said... if you let the ranger know before hand that you have a specific interest in birding they will first of all accommodate you and secondly they will surprise you with their knowledge of the birds.
Just as recently as last week Laksman, Skopsie and I booked for the sunset drive at Punda.
We found ourselves as the only
guests on board the bush vehicle with Tsepho, our ranger,
and could therefore truly concentrate on birding.
We stopped at a great sighting of a young leopard male, and checked out some kudu, impala, a carnivourless buffalo carcass, snakes and Pundaroos as well during our "nocturnal birding trip"... Apart from witnessing a great aerial pennant-winged nightjar display (seeing both male and female birds), we also stopped at the more obliging (from a photographic PoV) white-faced scops owl...Large viewLarge view
Generally, when on a "big 5" night drive I have never shied away from letting the ranger know that I would like to stop at nocturnal birds and actually insisted on him stopping.
He soon got the message... "Big 5" fans on the same drive had huge appreciation for my passion and actually enjoyed what the ranger had to tell them about each sighting.
So, if it is a "birding" night drive, or a "big 5" night drive, all of Kruger's offerings should still be enjoyed...
My point is that I will certainly make use of a night drive geared to birds if it is offered eventually, but in the meantime I do not feel let down with the attention afforded the birds on a "big 5" drive after having made my request to the ranger.
On the odd occasion (like with my mates and I at Punda), an impromptu birding night drive is quite possible.
If you have enough interest from fellow birders, you will be able to even arrange such an excursion by booking out a whole vehicle!