When I click on the lower half of the creatures in the legend it jumps to the ones in the upper half. So for example, if I click on pickrey, on the screenshot, camera selects snookion, if I click Pelgal it jumps to Charchin etc.
I just tried, and I have the same issue. I don't think I've ever actually had the legend extend that far, is that new with the recent update, or have I just never had that many species going before? I had to place a bunch of foragers all over the place in one of my save games, before I could try and replicate this problem.