Rarest Finds on Inaturalist

My rarest sighting was a Mountain Chickadee and Black Capped Chickadee hybrid, it was so cool! I found it when some conservationists came to my house to band birds, and they then caught the hybrid to band it.

1 Like

Personal favorite: I recorded this hybrid warbler in May 2017:


Balance of opinion is, this is a hybrid Black-throated Green Warbler/Canada Warbler. I’ve never seen or heard a bird like it, before or since.

Runner-up: my Ontario sightings of White-tailed Jackrabbit:


My understanding is, there are only five records for this species in Ontario, including these two.

1 Like

I think these are the rarest observations of mine, mostly new species for iNat;

https://www.inaturalist.org/observations/70816752 Bothrops barnetti, a little-known species of lancehead endemic to Peru

https://www.inaturalist.org/observations/72833621 Pseudogynoxys cordifolia, a new kind of Aster.

https://www.inaturalist.org/observations/72815684 A rarely-seen white variant of Ipomoea asarifolia which is used to make ropes.

https://www.inaturalist.org/observations/70450106 This strange variegated plant??

https://www.inaturalist.org/observations?taxon_id=621848 Trichomycterus punctulatus, a new species of pencil catfish.

https://www.inaturalist.org/observations/70816633 Pimelodella yuncensis, a new species of long-whiskered catfish.

https://www.inaturalist.org/observations/70449499 What I think is a new species of strangler fig for iNat (Ficus jacobii)

https://www.inaturalist.org/observations/66627859 What I think is some kind of Symphyotrichum from the Marañon Dry Forest

https://www.inaturalist.org/observations/69431487 Apparently the only observation of Tabebuia chrysantha in Peru?

https://www.inaturalist.org/observations/68827635 Not exactly rare, but here are the first photos of the vichayo or Incan guayaba tree (Beautempsia avicenniifolia), in fruit (both unripe and ripe)

https://www.inaturalist.org/observations/70253281 First observation for the region of Rauvolfia tetraphylla!

https://www.inaturalist.org/observations/70012870 Another new species, Tillandsia rauhii.
(and I have another observation that’s even rarer, but I can’t upload it right now)

:) I hope you liked them!


I managed to get the first observation for an entire order 3 years ago: the Bursariomorphida. It was most likely Bursaria truncatella, one of the largest known ciliates; I could easily see it beneath the coverslip without using my microscope. Not necessarily rare, but certainly under-observed.

Also, if my identification is correct, then this is likely the first known photograph of living Gymnosporangium trachysorum:

Another possible first known photo of living Acrospermum compressum var. foliicola:

Some of my rarities for iNaturalist (if correct):
Ophiocordycipitaceae: Possibly undescribed
Craterium paraguayense: 1st of 1
Licmophora remulus: 1st of 1
Kretzschmaria cetrarioides: 1st of 1, recently rediscovered and hopefully will sequence soon
Bruchomorpha nodosa: 1st of 1
Pseudobaeospora murrillii: 1st of 1
Calcarisporium xylariicola: 1st of 1, dubious ID
Cryptocephalus pumilus: 1st of 1
Cycloptilum slossoni: 1st of 2
Colaspis louisianae: 1st of 2
Arenaria tetraquetra ssp. amabilis : 1st of 3
Litonotus cygnus: 1st of 4
Campylodiscus clypeus: 1st of 4
Zelleromyces cinnabarinus: 1st of 19
Sempervivum minutum, Okanagana viridis, Neoharmonia venusta ssp. venusta, Phlomis crinita, Jasione crispa ssp. amethystina, Synchytrium geranii, Pleurotus cystidiosus, Megacerus corypha


I am quite impressed with your photography. Your pics are really well done. :)

Nice photos, and welcome to the forum!

Thank you so much! I’ve gotten a little bit better with my macro shots since I first started.

Thanks! I’ve been on iNat for a while, but the forum seem really fun and useful too.

I haven’t recorded anything rare, but have been involved in confirming the ID’s of some new species for iNat. The latest was from a fellow in Iran who tagged me ( Agrotis obesa from استان مرکزی، ایران on October 02, 2019 by Mohammad Amin Ghaffari · iNaturalist.ca). In true iNat fashion several folks were involved, and a resource project has been started for moths in that area!


I think a few of the fish I find are a bit rare. But mostly because people have to really look to find them (and in water too).
Besides that, only 1 undescribed species is what I can think of