For me, it would be July 14th, 2022 in the Caymans (64 life list firsts). It was an unforgettable trip, but I remember that day for the reef snorkeling.
I was pretty excited to see:
Mangrove Upsidedown Jellies (https://www.inaturalist.org/observations/126225846)
A barracuda (https://www.inaturalist.org/observations/126223279)
Carribean reef squid (https://www.inaturalist.org/observations/126222353)
Southern stingrays (https://www.inaturalist.org/observations/126224192).
I guess you can answer from a quantitative or qualitative standpoint - depends on what you prefer.
My best day this year was a 10 mile hike at the Grand Canyon (first visit) resulting in 158 observations of 126 taxa and 103 life firsts. Personal favorite was seeing the kaibab agave in bloom, while this butterfly record is my favorite iNat contribution https://www.inaturalist.org/observations/168443145
It is hard to pinpoint a particular day. Today is good. I have been restricted from being outside because of an antibiotic and the strength of our sun, and today nature decided it has waited long enough so has come inside to me!
This morning I saw a good sized Brown Anole (Anolis sagrei) jaunt across the floor multiple times as I read the paper (no Observation as it is common and I was taking my coffee), and then just now an enormous X’mahaná (Ascalapha odorata) brushed against me multiple times whilst I hung the laundry in our covered patio. That one I did make an Observation of when at last it alit at the top of the wall.
I like almost all my days on iNaturalist equally. I do not care for days when I cannot go outside.
Very cool! I’ve wanted to get to the Grand Canyon for quite some time.
Glad to hear today was a good day! I agree that days stuck inside are difficult. I also find it interesting that you said you like most days on iNaturalist equally - I can see where your coming from. Any day I can find the time to get outside in an an interesting place is valuable. I try to make that time at least once a week.
I don’t think anything will top this for me, right time right place, when 3 of us turned back early to walk very slowly for the one who was overcome by the heat (and who hasn’t walked with us since)
Shows the tail-biting defense, which was unsuccessful as the snake venom took its inevitable effect - which we had time to stand and stare at.
Second best - an undescribed sp nov