Hmm.. keep in mind yesterday was a bit on the cool side, and windy... So any breath could have shown up as a mist, or branches swaying could give a blurred transparent effect...
Also, mist inside the Grove isn't that uncommon of an occurrence... Which is why I've come into the habit of taking multiple pictures of the same thing consecutively. Also use a tripod if you have one. Eliminates much of the trembling that sometimes affects pictures.
Good photos though! Keep 'em coming!