I use iNat mainly for identifying because I enjoy looking at spiders. I use the desktop website for identifying. It would be nice to be able to change the number of observations per page. Right now I get 30 thumbnails.
I agree with @Darxus on changing the default suggestion. I would go further and say that for unidentified observations, that there is a greyed-out suggestion in the place that the first identification would belong, once the first identification is made (just a grey-text suggestion of “maybe this is … ___ ?”
Further, when there is a suggested ID (or the automated suggestion), sometimes it is useful to see where in the taxonomy tree that ID belongs. Clicking into an IDed observation, it is titled with the best current ID… then I have to click on that taxon to find out where it lies in “Life->Animals->Arthropods->…” This breadcrumb trail of taxonomy also provides a drop-down list for the lowest identification level, but sometimes we want to browse the other options at a different level. Also, using the drop-down is nice in that it displayed possible options on the page without loading a new tab… maybe with some icons/thumbnails there, if available, would be helpful (which I realize is not feasible in the very long lists).
Also, annotations are in a tab next to suggestions … it shouldn’t be too hard to include some checkboxes in the identification screen and get rid of that tab. Alive/dead, male/female, larva/adult stage which all be a single click rather than a drop-down menu in a separate tab (I think currently very view people use those annotations, but I would imagine that searching adult/larval males/females would be really useful for certain projects). Maybe award a count of annotations added as well (if it isn’t already), just to acknowledge the extra annotation work.
sometimes I want to work-down the long list of ‘unknown’ IDs in my region/country … maybe if all those appeared 30-or-more on a screen with a suggestion of just first-level plant/animal/fungus and we could agree to all, that would speed up the processing of ‘unknown’ objects. It would also be really nice if somehow I could only look at the ‘unknown’ (unlabeled) spiders/arachnids. This would require some grouping done by the auto-suggester.