Recording things that have disappeared

For the past 6 years, at some time from May to November I’ve posted observations of Goose Barnacle ‘infestations’ on washed up Cuttlebones and man-made objects - see https://inaturalist.ala.org.au/observations?taxon_id=144117&user_id=wamoz.
This year, I haven’t seen a single barnacle!
Is there some way of recording this change on iNaturalist?
If not, given the rapid rate of change in the natural world, it is something that might be worth implementing.

Maybe with trips?
https://www.inaturalist.org/pages/trips

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How do you get access to such functionality? I see it nowhere in the website menu.

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Interesting, never seen this before.

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Wow. Like the others, I didn’t even know of the existence of that feature. It seems very useful for monitoring populations and species composition of a certain area over longer periods of time. Or even just monitoring something like how changes you make in your garden affect biodiversity.
Thank you for sharing!

@tiwane is there any chance that this feature will be made more prominent and easy to find on the home tab at some point in the future?

It’s a bit hidden. I see translations are not complete, had in the past issues with api-v2
https://forum.inaturalist.org/t/api-v2-feedback/21215/103 and today found oout that the button ’ * List pages’ also does not work on this page.

Sorry maybe this actually isn’t an available feature. I’ve never used trips so I’m not sure.
https://forum.inaturalist.org/t/trips-feature-on-inat/3061/12

Even if this trips idea is not currently implemented, I think it is a good idea and would like to see it come to fruition. I have had several species that have been present every year except this one in which I have been wondering about how to properly record those absences, or sudden declines in species each year on certain sites. You can only do this so much using the history feature on taxon pages.

Ofcourse it is implemented: https://www.inaturalist.org/trips but I never used this option: https://www.inaturalist.org/trips/tabulate not sure what it does. I used it before, but switched off api-v2, cause I am not experienced enough to understand if it was a bug.


This even an app that creates ‘test Trip’ created from BioCaching mobile ap
https://mpapps.net/

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Thanks to those who provide feedback.
Trips definitely seem to be a hidden feature … I couldn’t find a link in the main menu structure (perhaps I looked in the wrong place).
The concept is right for my need but the specific method doesn’t align very well.
What I had in mind was something like a ‘negative’ observation on the basis of an extended time series - not a single trip. It would need to include a requirement to justify the post … ie explain why the taxon being posted is considered ‘missing’.
I guess anyone who was interested could ‘discover’ species absence or decline using searches in iNat but my idea would create a sign-post that could trigger further investigation.