I am pretty sure I can fit, with a minimum of squishing, 10 images in the space. They are 16" images in 24" frames, arranged in two rows of 5. I think that 8 images would also easily fit the space without looking sparse. So the question is: does the series benefit from being pared down? I keep vacillating. Here are potential layouts:
The more I look at them, I'm not really fond of the two images (the tapir and the dik diks) that get cut in order to pare down to a set of eight. They start to feel like filler, and I don't need to bother with filler, the space is tiny as it is.