These 6-spotted green tiger beetles were at the Audubon Centre in Houston (Edith L. Moore Reserve).
Size is around half an inch, and the colouring is a remarkable iridescent green, with touches of blue. You can see the six spots.
Completely different and smaller is this blue/black and red flea beetle seen at Seguin, Texas.
Apparently, they hop to propel themselves and fly away when threatened.
It is good to research and name these unknown (to me) species, although there is also a good argument to just be in, look and marvel at nature – rather than compulsively needing to name everything. Left and right brain – best to engage both!