In your question, there are several questions... did you talk about global Orchids in general, or about Orchids from your country ?
As far as I know, a comprehensive global key for the whole Orchidaceae family doesn't exist. Even if it was the case, it would be very difficult to use.
If you are searching for a key about Middle East and/or Palearctic temperate Orchids, there are a lot but in text format only and old (Flora iranica, Flora of Turkey, etc.). If you want a recent key including your area of expertise, it doesn't existe yet, and it is what we have to do together for Iraqi Kurdistan incha'allah !
And if you are searching for an "illustrated key", I am afraid it does'nt exist nor in the Mediterranean neither in the Middle East.
But if you are searching for an "illustrated book" (without reliable key), you can find "Orchideen Europas" (Baumann et al. 2006, in German) or "Orchids of Europe" by Delforge (one English edition). Personnally I don't recommend the Delforge's book (I don't like his taxonomic interpretation), rather is the Baumann's one even if it is not perfect.
One exception, the monography book on Orchis / Neotinea / Anacamptis genera (Kretzschmar et al. 207) which is really excellent : illustrated by photos and maps, with a comprehensive key of all species and subspecies...
All the best for the beginning Orchids season at Duhok with Sami and friends !
thank you for you valuable answer, yesterday i asked Dr Sami the same question at field he answered me the same answer as you did now, yes we have alot of missing data and un recorded species here from all types of plants, Inchallah we will find as much as we can to identified and make a good key book for here with dears (you, Dr Sami amd other friends). Nice to see you here dear Dr. Errol
Depuis 10 ans pour toutes les orchidées provenant de différents continents dans la Collection des Serres tropicales du Muséum, j' identifie les spécimens en se basant sur la structure micromorphologique de l’androcée, particulary on anther cap.
You can see my project.
participant ainsi au travail d’étiquetage de la Collection végétale vivante, en collaboration avec Denis Larpin, responsable des Serres tropicales du Muséum.
Thank you dear Dr Marpha Telepova Texier for your valuable comment, i will follow and look at your project on Orchids evolution and other projects of yours
I think the last attempt to consider all orchids worldwide was done by Rudolf Schlechter in the early 20th century, but revised a few times later until the late 20th century by others. This is called "Die Orchideen", which means literally the orchids. Previuosly others, beginning with Lindley tried this, but unfortunately a real key is not available. However, in most cases a rough group identification is easily done and thus specialised literature can be consulted. This is especially the case as in most regions specific groups can be found and hence a whole key for all other taxa is not needed.