Yes I was bored! But I hope this will be of interest to someone.
Here's a list of photos that are missing in the database of CO/Express/Micronesia aircraft at particular locations. If an aircraft type is listed after an airport, that particular aircraft type is missing at that particular airport (other CO a/c present). Otherwise, either or both CO and CO Express are missing (Micronesia listed separately). "Strangely missing" items in bold.
No, this does not include U.S. regional airports. I wasn't that bored
ZIH, PVR, GDL, SJD-738, MZT, TRC, SLW, AGU, MTY, CUU, TAM, SLP, BJX, VER, VSA, MID, CUN, CZM
SAP, BZE, AUA-753, ANU, STT, POP, MBJ, NAS, BDA
BOG (exterior), UIO, GYE, GUA, SJO-752, SDQ-764, GRU-764, GIG-764
LIS (recent), DUB (recent), CO / LIRF), Italy">FCO -764, more from GVA?
Micronesia (amazing, almost everything is missing)
CTS, SDJ, KIJ, NGO-738, KIX-738, OKJ, FUK, TPE?, SPN-738, GUM, GUM-767, MNL-738, Yap, TKK, CNS, DPS, PNI, KSA, KWA, MAJ
Add on if I missed anything, but I think this is a thorough list.
Unfortunately, our database is certainly far from complete, but it's nice to know that there's still "planespotting virgin territory", and quite a bit of it, even when considering CO alone. If I get bored again - AA next