Q:

Can these two trees be identified by photo. 

I would like know what these tree are.  They are located in San Diego county California.  The trees may not be native.  Thanks, Jon.  

A:

The first tree looks like some variety of apricot to me.   The leaves are young, so have not quite reached their full size and shape, but here is a picture of mature leaves to compare.   mature apricot leaves and fruit
I agree with WheelerWonka that the second tree is some form of Avocado.   The leaves are darker on your photo, but the flowers look to be very similar.   
It's been a while since you asked this question - have either of the trees put on any fruit since your post that could help us be sure we have identified them correctly? 