We still have at least 2 Ruby-throated Hummingbirds in our yard, one of 
which is an immature male.  I watched him sample just about every 
blossom on the Texas Sage.  A huge bumblebee (at least half the size of 
the hummer) was working the same patch and eventually moved into the 
hummer's personal space.  The hummer followed the bee for 30 seconds or 
so, but must have decided it wasn't worth an attack & flew off to perch.

I planted two of the Texas sage last year and was disappointed when I 
could not find any in the stores this year.  Needless concern.  The 
original plants did not overwinter, but they left tons of progeny which 
fed the hummers all season.  This is the first year where we have had 
reliable presence of a male hummer for the entire summer.

Georgia McDonald       Towson, Balt Co.