Would you happen to have any other images of this plant(s)? These look a little different to typical D. decurvum, but I am not sure if it is just the green colouration.
@MattM , I only had a couple of out of focus shots in addition to the three in the sighting. I have added one of them, and also added a crop of the third photo, so you get a closer image. But I'm not sure specifically what you wanted to see in more detail, is it the flower from a different angle, or a leaf?
Thanks Christine. I particularly wanted to see an image of the flower from the side. While a clear photograph is ideal, a slightly blurry photo of the plant from the side may still be adequate as I would be able to see the profile of the orchid (as in image 5). Looking at the way the sinus (the lower lip of the mouth) projects forward I am inclined to tentatively call this D. atrans.
@TobiasHayashi could you have a look at this one? The colouration, shape of the sinus, and short lateral sepals (with clubs?) look a bit atypical for D. decurvum.