Houbara Bustard:

This contains the houbara bustard, a new addition to the Arabian Nights expansion pack. 
The Download this First for AN is required for the bustard!

Place the .z2f file (located in the .zip file) into: C:Program Files/Microsoft Games/Zoo Tycoon 2

Download the Houbara Bustard Here

Vancouver Island Marmot:

This contains the cute Vancouver Island Marmot and the Pacific Silver Fir tree to match.
Place the .z2f file (located in the .zip file) into: C:Program Files/Microsoft Games/Zoo Tycoon 2

Download the Vancouver Island Marmot Here