Sometimes it's simply that we miss something. For instance the bee below has a friend off to the side I didn't notice until today.
Sometimes we think we're looking at a certain thing, but really we're not. The long-legged fly below has the markings and body shape of a bee. His green metalic color can be a give away, but not necessarily. There are bees with similar coloring.
Sometimes we know exactly what we're looking at. It's obvious. Just like the ladybug below with the cool spot of sunshine reflecting off its shell.
Perhaps, though, what might not be so obvious in the above shot is how old the ladybug is. Note the husk below. It's the shell of a ladybug pupae. Apparently my friend above had just hatched.
PS - I thought the ladybug pupae on the leaves were a different kind of ladybug larvae. If I remember correctly, some of them were moving. I wished I had realized what they were because I would have waited longer to see if some of them would emerge while I was there. Win some, lose some and know better next time:)