Insect and Spider Identification: Confirmation of ID, 1 by Jabeka

Jabeka wrote:
I found these two spiders in the yard today - the one is extremely small, I\'d say less than 1/4\" long while the other one is quite large and living on our shed door. I believe the small black and red one is a Splendid Dwarf Spider and while I know the large one is an orb weaver, I believe it to be a Shamrock Orb Weaver. If you can confirm my thoughts, that would be great. I could not get a clear shot of the orb weavers abdomen because of how she (I\'m assuming \"she\") is situated.