# Is a chrysalis a "construction" or a "molt"? **URL:** \ **Category:** General\ **Tags:** question, annotations\ **Created:** [September 19, 2026, 2:35am UTC](https://forum.inaturalist.org/t/is-a-chrysalis-a-construction-or-a-molt/85599 "2026-09-19T02:35:45Z")\ **Posts on this page:** 17\ **Page:** 1
**Author:** ![pburka](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.inaturalist.org/pburka/32/50462_2.png) [@pburka](https://forum.inaturalist.org/u/pburka)\ **Post date:** [September 19, 2026, 2:35am UTC](https://forum.inaturalist.org/t/is-a-chrysalis-a-construction-or-a-molt/85599/1 "2026-09-19T02:35:45Z")
When one observes a moth or butterfly chrysalis from which the adult has emerged, is the “evidence of presence” more properly a “construction” or a “molt”? Or maybe “it depends”? ---
**Author:** ![bugbaer](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.inaturalist.org/bugbaer/32/49657_2.png) [@bugbaer](https://forum.inaturalist.org/u/bugbaer)\ **Post date:** [September 19, 2026, 3:08am UTC](https://forum.inaturalist.org/t/is-a-chrysalis-a-construction-or-a-molt/85599/2 "2026-09-19T03:08:59Z")
A chrysalis is just a pupa with a fancy exoskeleton. It’s not something that the caterpillar built. So what’s left of a pupa or chrysalis after an adult has emerged is a shed skin, not a construction. But if there was a cocoon built with silk, shed hairs, etc., that would be a construction. ---
**Author:** ![dendroleon](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.inaturalist.org/dendroleon/32/27658_2.png) [@dendroleon](https://forum.inaturalist.org/u/dendroleon)\ **Post date:** [September 19, 2026, 12:04pm UTC](https://forum.inaturalist.org/t/is-a-chrysalis-a-construction-or-a-molt/85599/3 "2026-09-19T12:04:51Z")
i annotate it as organism unless it’s empty, in which case molt ---
**Author:** ![squidtk](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.inaturalist.org/squidtk/32/7385_2.png) [@squidtk](https://forum.inaturalist.org/u/squidtk)\ **Post date:** [September 19, 2026, 12:47pm UTC](https://forum.inaturalist.org/t/is-a-chrysalis-a-construction-or-a-molt/85599/4 "2026-09-19T12:47:30Z")
The silk pad a chrysalis is hanging from is a construction fwiw, but the empty chrysalis is a molt ---
**Author:** ![joeybom](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.inaturalist.org/joeybom/32/45237_2.png) [@joeybom](https://forum.inaturalist.org/u/joeybom)\ **Post date:** [September 19, 2026, 6:28pm UTC](https://forum.inaturalist.org/t/is-a-chrysalis-a-construction-or-a-molt/85599/5 "2026-09-19T18:28:22Z")
I think that whatever a caterpillar _constructs_ should be considered a _construction_: the silk pad that a butterfly chrysalis is hanging from, the cocoon that many moth chrysalises are inside of, and the cases and bags that some tiny moth larvae (like _Psychidae_ and _Coleophoridae_) carry around. The chrysalis itself is essentially a skin, an actual part of the living organism that it can’t live without until it’s ready to crawl out of it. An empty chrysalis is called _exuviae_, which I suppose can be called a _molt_ in English. ---
**Author:** ![bugbaer](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.inaturalist.org/bugbaer/32/49657_2.png) [@bugbaer](https://forum.inaturalist.org/u/bugbaer)\ **Post date:** [September 20, 2026, 11:38am UTC](https://forum.inaturalist.org/t/is-a-chrysalis-a-construction-or-a-molt/85599/6 "2026-09-20T11:38:54Z")
I’m sorry, I can’t help myself…_exuviae_ is plural, one shed exoskeleton is an _exuvia_ ---
**Author:** ![karoopixie](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.inaturalist.org/karoopixie/32/69882_2.png) [@karoopixie](https://forum.inaturalist.org/u/karoopixie)\ **Post date:** [September 20, 2026, 11:57am UTC](https://forum.inaturalist.org/t/is-a-chrysalis-a-construction-or-a-molt/85599/7 "2026-09-20T11:57:42Z")
Exuviae is always and only found in the plural 😉 > The Latin word _exuviae_,[[3]](https://en.wikipedia.org/wiki/Exuviae#cite_note-3) meaning “things stripped from a body”, is found only in the plural.[[4]](https://en.wikipedia.org/wiki/Exuviae#cite_note-4) _Exuvia_ is a derived singular form, although this is a [neologism](https://en.wikipedia.org/wiki/Neologism "Neologism"), and not attested in texts by Roman authors. A few modern works use the singular noun _exuvium_ (e.g.[[5]](https://en.wikipedia.org/wiki/Exuviae#cite_note-5)). Only a single historical work by [Propertius](https://en.wikipedia.org/wiki/Propertius "Propertius") uses the singular form _exuvium_, but in the meaning “spoils, booty”.[[6]](https://en.wikipedia.org/wiki/Exuviae#cite_note-6) From wikipedia, which is not the most authorative reference in the world, but at least references other texts. Which you can check out should you have the inclination. ---
**Author:** ![paul\_dennehy](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.inaturalist.org/paul_dennehy/32/1319_2.png) [@paul\_dennehy](https://forum.inaturalist.org/u/paul_dennehy)\ **Post date:** [September 20, 2026, 1:43pm UTC](https://forum.inaturalist.org/t/is-a-chrysalis-a-construction-or-a-molt/85599/8 "2026-09-20T13:43:00Z")
This is correct in classical Latin, but in my experience not true in entomological literature. The push and pull between Latin “purists” and those using the neologisms that have developed through centuries of use of Latin in science writing is a constant ongoing battle. For example, the hill one of my friends has decided to die on is that the suffix -oid is two syllables in Latin, “oh-id”, but virtually all newer uses of it in science to refer to a thing similar to something else see it pronounced “oyd”. So he pronounces Picoides and Noctuoid and all the other -oid words in the traditional Latin way, even though few scientists know what he’s saying at first. But it’s “technically correct, which is the best kind of correct”. lol My personal peeve is that “octopi” is a stupid word that shouldn’t exist, because octopus isn’t even Latin, and you can’t just take Greek words, pretend they have Latin endings, and start changing the ending as if it were Latin. But it’s in the dictionary, and we’re speaking English rather than Latin, so I’ve got to deal with it being a thing, even if it’s not a classical Latin thing. ---
**Author:** ![bugbaer](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.inaturalist.org/bugbaer/32/49657_2.png) [@bugbaer](https://forum.inaturalist.org/u/bugbaer)\ **Post date:** [September 20, 2026, 2:32pm UTC](https://forum.inaturalist.org/t/is-a-chrysalis-a-construction-or-a-molt/85599/9 "2026-09-20T14:32:37Z")
Yeah, I am definitely coming at this from a modern entomological literature viewpoint rather than a classical Latin viewpoint. And honestly, until karoopixie shared the original Latin definition, it hadn’t occurred to me that anyone would talk about one shed from one insect as being multiple things. I guess you could say a head capsule and the shed body exoskeleton are separate items, but it still doesn’t really make sense to me to talk about an empty chrysalis like it’s multiple items. I guess then the correct Latin singular would be _exuvium_ (even if people using Latin back in the day didn’t use it), but I don’t think I’ve seen that much in the modern literature. Google Scholar search gives [~1,700 hits for _exuvium_](https://scholar.google.com/scholar?hl=en&as_sdt=0%2C33&q=exuvium+entomology+-exuviae+-exuvia+-exuvial&btnG=) and [~3,800 hits for _exuvia_](https://scholar.google.com/scholar?hl=en&as_sdt=0%2C33&q=-exuvium+entomology+-exuviae+exuvia+-exuvial&btnG=) (both searched with “entomology” in an attempt to rule out unrelated uses). I care a little bit more about the data/datum issue since you definitely can always have individual data points vs. a group of them, but neither is a hill I’m going to die on ---
**Author:** ![karoopixie](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.inaturalist.org/karoopixie/32/69882_2.png) [@karoopixie](https://forum.inaturalist.org/u/karoopixie)\ **Post date:** [September 20, 2026, 2:49pm UTC](https://forum.inaturalist.org/t/is-a-chrysalis-a-construction-or-a-molt/85599/10 "2026-09-20T14:49:39Z")
Maybe it would be easier to accept exuviae if you consider that it is analagous to “remains” which is also always plural :-) Language is a magnificent game, and constantly evolving. One could wax lyrical about all sorts, but that is off-topic, so I shall be Good and not do it 😉 ---
**Author:** ![paul\_dennehy](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.inaturalist.org/paul_dennehy/32/1319_2.png) [@paul\_dennehy](https://forum.inaturalist.org/u/paul_dennehy)\ **Post date:** [September 20, 2026, 3:03pm UTC](https://forum.inaturalist.org/t/is-a-chrysalis-a-construction-or-a-molt/85599/11 "2026-09-20T15:03:51Z")
FWIW, I don’t italicize exuvium/exuvia when using them as entomological terms, which in my mind removes them from the realm of classical Latin and into the realm of modern science terms derived from Latin. When the Latin wiki says “Exuvia is a derived singular form, although this is a neologism, and not attested in texts by Roman authors,” I suspect it’s specifically referring to this newer use in entomology. Caligula wouldn’t know what I’m talking about, but a bug nerd would. Haha ---
**Author:** ![paul\_dennehy](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.inaturalist.org/paul_dennehy/32/1319_2.png) [@paul\_dennehy](https://forum.inaturalist.org/u/paul_dennehy)\ **Post date:** [September 20, 2026, 3:06pm UTC](https://forum.inaturalist.org/t/is-a-chrysalis-a-construction-or-a-molt/85599/12 "2026-09-20T15:06:47Z")
But to stay on topic, yeah, unless the observation is for the silk thread on the cremaster, it’s for sure a piece of the original organism, not a construction. Whereas the term for it is a modern construction, not a piece of the original Latin. So the real question is whether the annotation is about entomology or etymology. ---
**Author:** ![bugbaer](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.inaturalist.org/bugbaer/32/49657_2.png) [@bugbaer](https://forum.inaturalist.org/u/bugbaer)\ **Post date:** [September 20, 2026, 3:11pm UTC](https://forum.inaturalist.org/t/is-a-chrysalis-a-construction-or-a-molt/85599/13 "2026-09-20T15:11:26Z")
Good point! I don’t usually italicize them either; I just followed the style of the first person on the post who used them. I guess that’s another argument for trying not to twitch so much when people say/write “the data shows” or whatever ---
**Author:** ![fishkeeper](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.inaturalist.org/fishkeeper/32/26930_2.png) [@fishkeeper](https://forum.inaturalist.org/u/fishkeeper)\ **Post date:** [September 20, 2026, 3:37pm UTC](https://forum.inaturalist.org/t/is-a-chrysalis-a-construction-or-a-molt/85599/14 "2026-09-20T15:37:48Z")
The chrysalis itself, if not empty, is the actual organism. Once the butterfly has emerged, that’s a molt, as it’s an exoskeleton the organism has left behind. ---
**Author:** ![joeybom](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.inaturalist.org/joeybom/32/45237_2.png) [@joeybom](https://forum.inaturalist.org/u/joeybom)\ **Post date:** [September 20, 2026, 5:03pm UTC](https://forum.inaturalist.org/t/is-a-chrysalis-a-construction-or-a-molt/85599/15 "2026-09-20T17:03:09Z")
> [@bugbaer](#): > > I’m sorry, I can’t help myself…_exuviae_ is plural, one shed exoskeleton is an _exuvia_ To add to others’ explanations: some words weirdly enough only come in a plural form, or are usually used in the plural form. Not only in Latin, but also in other languages. English has some of these words, too. Someone mentioned _remains_, which is a good one. Others are _pants_ and _glasses_, which is weird, because in the end they’re a single item. In Dutch, we actually use a singular form to describe a single pair of pants or a single set of glasses, and using the plural would indicate several items. _Clothes_ is another one, and _exuviae_ are like the former clothes of the organism. > [@bugbaer](#): > > I guess then the correct Latin singular would be _exuvium_ I think _exuvium_ would be correct, if _exuvia_ was the plural form. But the original word _exuviae_ is plural, so the correct Latin singular should be _exuvia_. Like _rosa_ and _rosae_. ---
**Author:** ![asteroidowl](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.inaturalist.org/asteroidowl/32/66656_2.png) [@asteroidowl](https://forum.inaturalist.org/u/asteroidowl)\ **Post date:** [September 20, 2026, 8:31pm UTC](https://forum.inaturalist.org/t/is-a-chrysalis-a-construction-or-a-molt/85599/16 "2026-09-20T20:31:50Z")
I agree with this. If you’ve ever watched a monarch caterpillar do its final skin molt and turn into a chrysalis – the chrysalis is literally the caterpillar. So, organism for green (or other relevant color) chrysalises. Once the butterfly is out of the chrysalis - it’s a molt. If you have an emerging butterfly, molt and organism. If the butterfly is still _in_ the chrysalis but has not yet broken out - I would still label it as an organism bc it hasn’t “molted” the external layer yet. For butterflies and moths that build cocoons around themselves, I would say the cocoon is a construction. ---
**Author:** ![bazwal](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.inaturalist.org/bazwal/32/109_2.png) [@bazwal](https://forum.inaturalist.org/u/bazwal)\ **Post date:** [September 20, 2026, 9:01pm UTC](https://forum.inaturalist.org/t/is-a-chrysalis-a-construction-or-a-molt/85599/17 "2026-09-20T21:01:20Z")
> [@paul\_dennehy](#): > > So he pronounces Picoides and Noctuoid and all the other -oid words in the traditional Latin way, even though few scientists know what he’s saying at first. But it’s “technically correct, which is the best kind of correct”. Technically, the correct pronuciation of “oi” depends on the period of latin. In old latin, “oi” would have been pronounced as a dipthong (equivalent to “oe”). So maybe your friend isn’t being classical enough…