White butterfly (looks like a Pierid) seen on 2026 Aug 03, (in sidereal Cancer, if that bit of info is topical to this post)
When I was very small, some auntie had asked me what my zodiac sign was. I did not know how zodiac signs were assigned, I just assumed one picks an animal, so I answered that I am a butterfly.
It was only recently that I realized that butterfly could actually be interpreted as a valid zodiac sign, if you are a Cancer. Insects are part of Pancrustacea, albeit closer to Brachiopoda, such as waterfleas, than to Malacostraca, such as lobsters and crabs.
Carcinisation has happened in at least five groups of Decapod Crustaceans (within Malacostraca), I presume due to ecological advantage. Evolution is very flexible, and the morphospace within Pancrustacea is staggering, ranging from parasitic barnacles, through coconut crabs (a hermit crab, not a true crab) to fairyflies (very small flying insects.) Thus, I would speculate that even insects, when exposed to sufficiently long evolutionary opportunity might undergo carcinisation, though at the current levels of ecological occupancy, this is extremely unlikely on Earth. Maybe on some terraformed environment…
Assuming the insect potential to carcinisation, I would then expand the postulate that insects could be considered equivalent to crabs. At least, if squinting hard from some non-Euclidean, deeply imaginary angle. Thus, butterfly would be a valid zodiac sign.
Of course, considering the deep divergence of Decapod and Insect crown lineages (Communostraca and Allotrichocrdia, respectively) some time during Cambrian or even Neoproterozoic era, on the same logic Leo, Pisces, Aries, Taurus, Gemini, Capricorn, Sagittarius and Aquarius would be interchangeable, whereas Scorpio would still form an evolutionary outgroup. I do not include Virgo here, because the presumed fertility/judicial deity is represented by constellation Furrow with Spica (signifying grain), and Furrow is neither a Chordate nor an arthropod (or maybe the constellation was named after the things she represents and Virgo should be among Chordata). Also excluded is the putative thirteenth zodiac, Ophiuchus, since the standard calendar uses only twelve signs. And to fully confuse the issue, astronomically, the Buttefly Cluster resides within the constellation of Scorpius, which after all, is another arthropod.
As the origins of the zodiac signs would require another, deeper dive into Mesopotamian mythology, and the origins or Western calendar, mathematics and astronomy, none of which are my strong points, I’ll skip them here. And what do I think of astrology in general? I presume that during the Bronze Age and earlier times, human biology was much more connected to annual variation in circadian rhythms and seasonal variations in diet, and thus a baby born in summer months would have different gestational environment and early infancy than a child born in winter or spring. The differences were probably strong enough to affect the later health and psychological development of the individual, causing observable differences between cohorts born, e.g, when Sun was in Leo rather than in Sagittarius. Modern horoscope warnings about tall dark strangers approaching on Tuesday, are nonsense, I think.
Summa summarum, I consider butterfly to be approximately as valid a zodiac sign as the zodiac signs in general, and depending on taste, equivalent of Cancer or Scorpio.
Brown butterfly seen on 2026 July 17th, still in tropical Cancer
