Search for observation fields and values
You can specify observation fields and their values in the URL. For example, here are all of the observations with the observation field “Roadkill” set to “Yes”.
https://www.inaturalist.org/observations?field:roadkill=yes
You can search for all observations with a field regardless of the field value (e.g. the field “Habitat (s Afr)” only):
&field:Habitat%20(s%20Afr)
or with a field and value (e.g. “Habitat (s Afr)=Nama Karoo”):
&field:Habitat%20(s%20Afr)=Nama%20Karoo
You can also find observations missing a named field:
&without_field=Name of Associated Plant
You can easily combine these with other search strings. For example, the following shows all observations marked as being of insect herbivores of Eucalyptus.
https://www.inaturalist.org/observations?taxon_id=47158&field:Interaction->Herbivore%20of=51815
The taxon ID for Insecta is 47158 and for Eucalyptus is 51815 (which you find from the URLs of their taxon pages, https://www.inaturalist.org/taxa/47158-Insecta and https://www.inaturalist.org/taxa/51815-Eucalyptus). The observation field used here is “Interaction->Herbivore of”. Note that the space in that field name needs to be replaced with a %20 in the URL so the browser doesn’t get confused.
Observation field view
https://www.inaturalist.org/observation_fields/1234
Observation field view for a value: (e.g. Fynbos in Habitats-s-afr):
https://www.inaturalist.org/observation_fields/7498?value=Fynbos (case sensitive)
Ascending list of observation fields:
https://www.inaturalist.org/observation_fields?order_by=name&order=asc
Descending list:
https://www.inaturalist.org/observation_fields?order_by=name&order=desc