In an English antiquarian bookshop I found a book by Arthur Twidle from 1920 with the title: Beautiful Butterflies of the tropics - how to collect them.
Arthur Twidle (1865? - 1936) was a well-known illustrator in his time. He was best known for his illustrations of the Sherlock Holmes books. But he must have collected butterflies himself, because in an autograph letter of 5 October 1920 to his brother, which I found between the pages of the book, he wrote: "It is strange that my old hobby should have resulted in a book". The book contains 13 glued-in plates (in the original watercolours) with tropical butterflies in "natural" surroundings.
The book does not claim to be scientific but is intended to the beauty of tropical butterflies to a wider audience.
On a similar note, the well known lepidopterist Hermann Strecker whom was a sculptor by day and a lepidopterist at night also produced a monumentous work in three different parts in the latter part of his life (1870's +).
He too hand colored each and every plate in all three parts of his book.
And if you can believe this he made 500 copies in total !!
Nowadays, any copies are very exclusive to own. A few are known to be present in the "rare book sections" of a very few libraries. Also, a few fortunate collectors also have copies.
These too are very beautiful works and strecker was indeed passionate about his hobby.
I would add that Mr. Twidle must of had some measure of means in life to afford having his works color printed.
Printing of any kind (even back in the day) did not come cheaply. The vast majority of pictures then were black/white's to save on cost (if printed). Colorized pictures were on a whole nother' level of cost !
Especially, times(X) how many copies you wanted produced.
Which is why a few enterprising yet (lack of funding) collectors/individuals such as Hermann Strecker went the route of hand-coloring their own works.