Identifying Moths -
About the website
Criteria for Identification
It is assumed that for each moth you will take a good photograph of the adult from
above when it is resting. Some moths fold their wings over their bodies, so you may
need a photograph from the side.
Characters such as underwing, underside marks will only be used if the species cannot be identified from wing markings.
You should record the length of the forewing from base to tip in any unknown moth. Some sources quote the wingspan but this is difficult to measure in a live moth.
Some identifications will also depend on the date the adult is recorded
Sometimes two species are so similar and there is so much variation in one species
that the size, the date and the forewing markings are not sufficient to differentiate
between them. In this case either they will have to be killed and dissected to identify
Using the website to identify a Moth
1. If you think you know the name of the moth type all or part of its English or Scientific name into the search box and press find. This will show any page containing this name.
2. If you don’t know what the moth is try to work out which of the main groups it
is in : Geometers, Noctuids, Tortrixes, Other macros or Other micros. On the Home
page there are thumbnails to help with this:-
If you click a thumbnail it will take you to the page with a group of moths which
If you click a green button it links to the list and pictures for the whole family or large group.
3. With the list and pictures option:-
if you roll the mouse over any thumbnail you get an enlarged image
if you click a green button it links to the page with that group of moths which look similar.
The website has been written by Tony Rackham
All the photos have been taken by the author unless stated otherwise
The purpose of the website is to make the identification of common moths easier using clear pictures and simple but unambiguous language.
Scientific terms are avoided unless they make an explanation simpler. There is a glossary and a set of diagrams which explain scientific terms to help with descriptions in other books and websites.
The main sources of information are:-
1. For each major group of moths there is a list and large pictures for all the moths included. The list has Common name (if there is one), Scientific name, Bradley and Fletcher number and a thumbnail.
2. For each small group of similar moths there is a web page showing the differences using pictures, descriptions and pointers to the characters mentioned.
The Moth species illustrated
All the moths chosen are relatively common in the United Kingdom -
Each of the moths chosen is easily confused with at least one other common species
If a common species is easily confused with a much rarer species this is mentioned