Finnish research. When night never falls: female sexual signalling in a nocturnal insect along a latitudinal gradient

https://link.springer.com/article/10.1007/s00265-020-02927-9

More excellent Finnish research. Worrying study into the maladaptive response to artificial light

https://royalsocietypublishing.org/doi/full/10.1098/rspb.2020.0806

The mighty John Tyler’s book

http://www.johntyler.co.uk/shop.php

The eminent American Firefly biologist Sara Lewis. Her book is an insight into the magical world of Fireflies. Search for her book ‘Silent Sparks’ on any book seller website.

Another eminent Firefly biologist Lynn Faust. Her book is amazing. A nice addition to any naturalists library.

A better explanation of the chemical processes and genetics for the glow. 
https://www.researchgate.net/publication/14589707_Sequence_and_biochemical_similarities_between_the_luciferases_of_the_glow-worm_Lampyris_noctiluca_and_the_firefly_Photinus_pyralis