Crambus Update

15 January 2023

For the last year I have been trying to add identifications on all observations of the genus Crambus Fabricius from North America that have been posted on iNat. As of 10 January 2023, there have been 22,590 verifiable North American records posted at iNat. Of these 16,780 (74%) have reached research grade (RG). I have personally reviewed 19,314 (85.5%) leaving me with a little more than 3000 observations to review, which I intend to go through by the end of April 2023.

In the last two years, more than 12,000 observations of Crambus have been submitted to iNaturalist. As a result, there are now four species with more than 1000 RG observations: C. agitatellus (7419), C. praefectellus (2385), C. albellus (1592), and C. laqueatellus (1111).

Rounding out the top ten species on iNat are: C. saltuellus (970), C. girardellus (531), C. leachellus (444), C. perlella (414), C. bidens (382) and C. unistriatellus (321). A total of 15 species have more than 100 observations.

Currently there are 43 species in the genus that occur in North America north of Mexico, but two of these (dimidiatellus & angulatus) will be transferred out of the genus with the next revision. Thirty-five species have been recorded on iNat. The unrecorded species are: ainsliellus (which can only be separated from leachellus by dissection); angulatus; bigelovi; cockleellus; johnsoni; leuconotus (there is a record from Mexico on iNat); and trichusalis.

Significant finds in the last year include the following:

Two records of C. awemellus: one from Michigan by @susan_kielb and one from Manitoba by @kkrockytop bring the total number of observations to 3!

Four records of C. cyrilellus, all from NM, bring the total to 14 by @wendybirdsbyrv (two observations), @dull2shinetoo, @adrianj. This is a fairly common species, so the small number of records on iNat may be due to the relative dearth of observations from the southwestern states where it occurs.

The first record of Crambus dimidiatellus on iNat from CO by @adrianj.

Two observations of C. gausapalis, doubling the iNat total, from CA by @tiwane and @yubabirder.

Four observations of C. hamella, all from Quebec, 3 by @jo_gagnon and one by @ygobeil which bring the iNat total to 14.

One additional observation of C. harrisi by @rkostecke brings the total to 16 on iNat, all from TX.

From Quebec, @jo_gagnon added iNat’s second record of C. lyonsellus.

Ten observations of C. multilinellus were added during 2022. The range map for this species is filling out nicely. The only other states where it occurs (based on specimen records) are TN and LA. Adult phenology has also been well circumscribed by iNat.

iNat’s 10th record of C. rickseckerellus was found in CA by @chilipossum.

There were 19 new records of C. whitmerellus, which is about 40% of the iNat total.

Sixteen additional records of C. youngellus increased the number of observations on iNat by 50%.

The range maps for some species are getting fairly impressive, and even for species with a relatively small number of observations, the range map gives a good idea of where the species might be expected.

A Tip for Photography of Crambus
Too many of the photographs submitted to iNat can’t be identified further than genus b/c of poor quality or because the photo is taken in top-view only. It is essential to photograph Crambus, and most micros, in profile to improve the odds of obtaining an identification.

Comments welcome.

I am tagging several people who have photographed or IDed a lot of Crambus as this post may be of interest to them. Feel free to tag others. Apologies in advance for those I have omitted: @a_anctil @joannerusso @jasondombroskie @tcooley @edporopat @treichard @birds_bugs_botany @bobharding @brevan_wagner @btk @lepalot @maractwin @joebartok @arborsphere @henryhawkes @smithsqrd @mercedes-fletcher @thomasirvine @jenniferwhanson @ken_j_allison @sgalick @stubirdnb @suegregoire @jo_gagnon @gis1 @paul_dennehy @dull2shinetoo @garyyankech @allenratzlaff @johntrent @roshan2010 @psweet @markread @marc_belisle_usherbrooke @robpendergast @erikamitchell @michael_butler @michelarrivee @robertdifrusca @md-in-ns15 @hholbrook @mikeburrell @josh_vandermeulen @imbeaul @jollygoodyellow @dan_macneal @joefrechette @seabrookeleckie @driley @lockebeulve @safechrislaurie @finatic @cbuelow45 @joshualincoln @iandavies @gaudettelaura @rayray @pmaxp @bryanpfeiffer @scholtensb

Posted on Φεβρουάριος 27, 2023 0313 ΠΜ by hughmcguinness hughmcguinness


Thanks for the update. I'll add that since the listed date of this update, Crambus cockleellus now has a research grade observation ( by @fmcghee

Αναρτήθηκε από brevan_wagner πάνω από 1 χρόνo πριν

Thank you for your work in this genus! Is there a visual key somewhere by which a novice can compare the species side by side to aid in identification beyond the genus level?

Αναρτήθηκε από dull2shinetoo πάνω από 1 χρόνo πριν

Thanks, Hugh! Another season of mothing coming up!

Αναρτήθηκε από garyyankech πάνω από 1 χρόνo πριν

This is great! Jim Vargo and I have both taken C. multilinellus in New Jersey; I'll post a specimen photo later today to add to the range map.

Αναρτήθηκε από paul_dennehy πάνω από 1 χρόνo πριν

Thanks Hugh for IDing/confirming pretty much all my Crambus!

Αναρτήθηκε από rayray πάνω από 1 χρόνo πριν

Thank you for all your hard work! Glad I got good enough photos to help with C. cyrilellus.

Αναρτήθηκε από wendybirds πάνω από 1 χρόνo πριν

Wow this is really fascinating stuff, I'm happy to see so many seldom-observed crambids getting more observations!

Αναρτήθηκε από mercedes-fletcher πάνω από 1 χρόνo πριν

Massive appreciation for your curation and dedication to making iNaturalist better, Hugh.
Tagging @gcwarbler to this post as well.

Αναρτήθηκε από sambiology πάνω από 1 χρόνo πριν

Great work, Hugh...but what have you been doing in all your free time?? ;-)

Αναρτήθηκε από gcwarbler πάνω από 1 χρόνo πριν

Impressive and important work. Thanks!

Αναρτήθηκε από marc_belisle_ushe... πάνω από 1 χρόνo πριν

Excellent post! I love these kinds of breakdowns.

Αναρτήθηκε από smithsqrd πάνω από 1 χρόνo πριν

Thanks for all your work, but also for sharing your knowledge and helping others become better at identifying Crambus species!

Αναρτήθηκε από a_anctil πάνω από 1 χρόνo πριν

Kind of surprised C. leachellus is so common (it's not one you hear of in guides), and I don't have a single observation of C. perlellus but I have seen youngellus and braunellus

Αναρτήθηκε από rayray πάνω από 1 χρόνo πριν

There are a few very nice moths in other genera within the Crambinae subfamily, like V. auratella and critica.

Αναρτήθηκε από garyyankech πάνω από 1 χρόνo πριν

Awesome! Thank you, Dr. McGuiness!

Αναρτήθηκε από tcooley πάνω από 1 χρόνo πριν

Thank you for tagging me :)

Αναρτήθηκε από jollygoodyellow πάνω από 1 χρόνo πριν

Thanks for the tag, fascinating stuff :)

Αναρτήθηκε από lockebeulve πάνω από 1 χρόνo πριν
Αναρτήθηκε από treichard πάνω από 1 χρόνo πριν

nice visuals! Wish I knew how to make these maps

Αναρτήθηκε από rayray πάνω από 1 χρόνo πριν

Nice Timothy!

Αναρτήθηκε από garyyankech πάνω από 1 χρόνo πριν

@treichard Who do you think you are? Seurat? Those maps hurt my eyes. But your point is well-taken: the range maps of many species of Crambus are now quite good and getting close to complete.

Αναρτήθηκε από hughmcguinness πάνω από 1 χρόνo πριν

Thanks f tagging me in this! Very interesting stuff and I'm glad to see that the range maps for this genus are getting filled out.

Αναρτήθηκε από jenniferwhanson πάνω από 1 χρόνo πριν

Awesome work and thank so much for all the IDs! Can't wait for another mothing season.

Αναρτήθηκε από dan_macneal πάνω από 1 χρόνo πριν

Such amazing and valuable work, Hugh! That's been quite an undertaking. Thanks for all the effort you've put into moths both here and elsewhere over the years. It's all the quiet work put in by knowledgeable folks like yourself that even makes my own work possible.

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