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The Black Witch

 

With Halloween fast approaching, Mike Southall thought it might be appropriate to write about the Black Witch moth (Ascalapha odorata).

 

This is a very large moth in the Erebidae family, with females having a wingspan of up to 20cm and males being slightly smaller. The adults feed on over-ripe fruit and tree sap, while the larvae eat mainly legumes. Resident in the southern United States and tropical parts of central and southern America, it can disperse over great distances at high altitude and has been recorded in Canada, Alaska, Argentina, Chile and the South Atlantic islands of Ascension and Tristan da Cunha.

There are five European records: Britain 1899, Denmark 1931, France 1978, and Spain 2007 and 2008. The British record is of an individual found in the orchid pit at Kew Gardens, suggesting it was imported with plant material, and therefore it is on the British Appendix A adventive list. The other European records could well be genuine transatlantic crossings, and it has also been recorded in Africa.

 Female Black Witch moth

 I've been fortunate to encounter the moth on two separate trips to South America. The first on 18 November 2019 was high in the East Bolivian Andes, where a female was resting on a beam inside my small toilet cabin. I recall getting quite a shock to find this huge moth unexpectedly. The females have a white bar across the wings, which the males lack. The second on 13 November 2024 was a male attracted to actinic light on a trip to the East Peruvian Andes.

 Male Black Witch moth

 A thermal image of the male shows the heat inside its thorax

 Superstitions surrounding this species vary from culture to culture. In Mexican and Caribbean folklore, it's considered a harbinger of death, baldness and blindness. If there's sickness in the house and the moth enters, the sick person will die. In Texas, the moth must visit all four corners of the room for death to occur. In Jamaica, they're called 'duppy bats' meaning bad spirits or flying ghosts. In the Bahamas, they're known as 'money bats' – if they land on you, you'll come into money. Similarly, in South Texas, if a Black Witch lands on your door and stays a while you will supposedly win the lottery. In Hawaii, if a loved one has just died and this moth appears, it's thought to be the embodiment of the soul returning to say goodbye.

In popular culture, it was Black Witch pupae that were placed in the mouths of victims of the serial killer 'Buffalo Bill' in the novel The Silence of the Lambs. In the movie adaption, they were replaced by Death’s-head Hawk-moth pupae.

The genus to which this species belongs is named after a figure from Greek mythology. Ascalaphus, son of the stygian river god, Acheron, and the nymph, Orphne, was the custodian of Hades' orchard in the Underworld.

Whatever the myths, it is a stunning species.

Sources:

  • Moths of Great Britain and Ireland by Sean Clancy
  • Wikipedia

 Note: Back in 2019, Andrew Cooper picked Ten Magical Moths for Halloween for Butterfly Conservation.