if my exif data program are showing correct data here are my "newbie" comments
can see you are trying around the different mode...program and manual.
for 1st waterfall photo...data shows:
manual white-balance, which i think auto will do for that.
flash fired, normally i think flash not required...you are not taking any object or dark area but instead the waterfall and hopefully the silky effects.
manual mode @ f2.8 speed 1/1000, setting is wrong already. maybe you can read up on f-stop usage. but here speed is the biggest consideration for silky effect...try using shutter mode on your dial and try using 1sec and above. you can learn from there and understand how to set in manual mode..
hehe the last 2 birds very nice...ps abit more to make it better!!
cheers...my long opinion. :embrass: