We managed to find several individuals of one species, Pacific Forktail (Ischnura cervula), which may be good considering temps in the 50s (F).
Nannothemis captured this male having lunch:

I was able to capture a couple males by hand for these shots:


...and the habitat along the San Diego River:

The next day Nannothemis captured this image of me on the hunt for a female:

Here's a female Pacific Forktail (Ischnura cervula) in the hand:


Hopefully our next destination turns up more species, but we suspect that may be a tall order. Check back in a couple of weeks to see if we have any success.