I had Brendon Boudinot of the UC Davis Ward Lab identify them.
A lone ant wandering around over the leaf litter, mid morning, in a public park.
A lone ant walking about on a shrub, late afternoon, in a suburban yard.
Large ants seen running about on leaf littered ground, apparently going to and from a feeding spot.
Large ants roaming around a large tree and surrounding ground, in a public park.
These ants seemed to be eating sap from the kaikomako tree. The small wound in the tree and the ants were behind some lichen that was growing on the tree trunk.
Ants are social insects of the family Formicidae /fɔrˈmɪsɨdiː/ and, along with the related wasps and bees, belong to the order Hymenoptera. Ants evolved from wasp-like ancestors in the mid-Cretaceous period between 110 and 130 million years ago and diversified after the rise of flowering plants. More than 12,500 out of an estimated total of 22,000 species have been classified. They are easily identified by their elbowed antennae and a distinctive node-like structure that forms a slender...