self pollenators?

[DirtyCoconuts]

I have noticed that a staggering number of my ground orchids are pollenated and going to seed.

I would estimate that 50 % of the plants have at least one pollenated flower and that of those plants, most have more than one pollenated..pics below.

now this is the kind of pollination rate i expect from any plant that is around it's natural pollenators but it seemed crazy high for an orchid....is it possible they are self sexing?

Dichaea longea by J Solo, on Flickr

Dichaea longea by J Solo, on Flickr

Dichaea longea by J Solo, on Flickr

Dichaea longea by J Solo, on Flickr

Dichaea longea by J Solo, on Flickr