I have to say that today the safari felt very empty as in with the amount of species. I think that knowsley really need new species now to fill up the safari again. They have plenty of space for more species.
I've had a season ticket for 17 or 18 years now, get it now only as 2 or 3 visits and its paid off for the year. The safari drive is a shadow of its former self. We used to go at least twice a week as there was nearly always something exciting going to happen. In about 2013/15 time the numbers of the animals on safari dropped and dropped, the diversity of species remained and later slightly increased. However, just off the top of my head, in what I call 'The Rhino section' from approx 2006 to about 2010, the actual volume of animals was well over 3 x the number you see now. There was 40-50 Eland, similar numbers of American Bison, 6 or 7 Ostrich, 6 Guanaco's, Forrest Buffalo similar numbers to now, a few wildebeest, 3 regularly breeding female rhino's (at that time 'Bud' was the bull.
Up until around 2014(ush) there was a breeding pride of lions, as a breeding pride they were more interesting (when not asleep). Pere David's deer numbers where around 4 or 5 times the number they now have, cape buffalos, rhea, emu & ostrich, jungle fowl. Bongo's displayed so you could see them. African wild dogs, African elephants, a collection of male giraffes, I think cross breds, but a good crowd pleaser non the less. There was a gap when they had no giraffe for a couple of years too.
You also used to drive round the opposite way as to which you do these days, so your drive would start by going up the hill towards the now wild ass enclosure and into the lions.
The baboons used to escape to, which was pure entertainment as you can imagine, albeit a pain in the arse for the keepers!
The now bird of prey area which is good used to be a farm/zoo area with breeding pigs, a few goats, llama and highland cattle.
The walk around area (bar no elephants) is better now, but the safari drive is certainly 'meh' these days.