I have looked through their database in the past and I usually don't have much luck finding the oddballs that I search for. As you said, they can't be always up-to-date because they're constantly planting new things, changing things. And if you look through the pages, a lot of them don't have photos at all, just placeholders for them. Add to that the color variations you can sometimes get between photos and then monitors making it more difficult.
But it's definitely a good place to start, I do actually look through the photos, just not the oddball things.
I do remember finding these around 4 water sections with railings nearer the entrance, along the outer edges of the water pools. This area changes constantly, even the dirt areas around the pools. When the water lilies are blooming, they put many of them in these pools, so you get a lot of variety in one spot.