To view observation fields with your Observado ID, you might want to bookmark a link like this:
https://www.inaturalist.org/observations?field:Observado%20URL=https:%2F%2Fobservation.org%2Fwaarneming%2Fview%2F119969639
and then edit that number at the very end of the URL to your Observado ID in question.
It's my understanding that a redesign of the observations search page is on the to-do list for the website developers, and I do hope they include observation fields/annotations in the filters. For now you can navigate to an observation to find the appropriate URL (e.g. see attached, where you would click "Observations with this field and value") to find the link above.
iNaturalist doesn't have any "standardized" observation fields for host species. "Host" is the most used one, though "Host plant" is also commonly used. Here are all the observation fields with "host" in the name. The only standardized observation fields (aka "Annotations") are Sex, Life Stage, and Flowering Phenology. Read more about annotations here.
https://www.inaturalist.org/observations?field:Host=56312
UNDOCUMENTED SHORTCUTS
Texel http://texel.waarneming.nl/
Vlieland http://vlieland.waarneming.nl/
Terschelling http://terschelling.waarneming.nl/
Ameland http://ameland.waarneming.nl/
Schiermonnikoog http://schier.waarneming.nl/
Rottumerooog http://rottum.waarneming.nl/
Eastern Europe https://eastern_europe.observation.org/map_lastobs_v2.php
Iberian Peninsula https://iberia.observation.org
Nord Pas de Calais https://nordpasdecalais.observation.org
Nordrhein-Westfalen https://nrw.observation.org
West palearctic https://westernpal.observation.org
Canarische eilanden https://canarias.observation.org
Dutch Caribbean https://dutch_antilles.observation.org
Amazon Rainforest https://amazon.observation.org
Patagonia https://patagonia.observation.org
Dutch translation, there are instructions here: https://www.inaturalist.org/pages/translate - Tony
https://www.doabooks.org/doab?func=search&uiLanguage=en&template=&query=vegetation
https://www.doabooks.org/doab?func=browse&uiLanguage=en&queryField=dutch&x=0&y=0
https://www.doabooks.org/doab?func=search&page=5&template=&query=dutch&uiLanguage=en
https://www.doabooks.org/doab?func=search&query=birds
https://www.doabooks.org/doab?func=search&query=environment
https://www.doabooks.org/doab?func=search&query=plants
https://www.doabooks.org/doab?func=search&query=ict
https://www.doabooks.org/doab?func=search&query=software
https://www.doabooks.org/doab?func=search&query=ökologisch
https://www.doabooks.org/doab?func=search&query=software
https://www.doabooks.org/doab?func=search&query=ecology
https://www.doabooks.org/doab?func=search&query=software
https://www.doabooks.org/doab?func=search&uiLanguage=en&template=&query=environment
--
www.biodiversitylibrary.org
Biodiversity Heritage Library
The Atlas of Breeding Birds in Britain and Ireland by J. T.R. Sharrock — free epub
http://pdf.to/index/page-1/
https://www.biodiversitylibrary.org/
http://pdf.to/index/page-1/
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