I suspect I have rafts of duck shots with 4-5 species and I know I have some shorebird shots that must have 5 species or more in them.
Here's 4 species - Black-tailed and Bar-tailed Godwits, Curlew Sandpiper and Great Knot.
Of course, if you back off far enough.....
.....I know this shot has at least Little Pied Cormorant, White-faced Heron, South Island Oystercatcher, Bar-tailed Godwit, Red Knot, Black-billed Gull and White-fronted Tern. I'm sure there are some Sharp-tailed Sandpipers and possibly a Wrybill or two in there.
I might have a hummingbird feeder shot with 4 or 5 species visible from Ecuador. Have to look.
Maybe a different challenge, but I like to try to get comparative shots of closely related/similar species together.
I spent a long time stalking to get this shot showing two South Island vs. Variable Oystercatchers side by side in the same pose.
Black-bellied and Fulvous Whistling-Ducks -
Ross's and Snow Geese (Blue and White) -
and a side by side comparison of a big and "small" Albatross (Gibson's Wandering and Buller's). I took about 200 shots of fly-by albatross to finally get this one side by side.