I'm second-guessing my ID. I think it's a Cooper's Hawk. That 'little bit of a grey cap' and 'optimism' initially said Peregrine, but the absence of sideburns and the coloration/pattern is more in line with a Cooper's.
I've had my GF pond for two years and I spotted a heron for the first time this morning.
Think it was a great blue, even though I have a heron net it will try to get my fish and be back soon.
Going to put a motion sensor cam to alert me when it returns so that I can audibly try to scare it away.
Anyone know if they are active at night? View attachment 94800
Generally no, unless that is the only time their main food source is available. So, doubtful your pond is their main source. Near me, there are two very large Herons I can see every day. One flies West every AM and East every PM, the other flies Northeast/AM and Souteast/PM - I call it the commute.