This small beetle was found in my garden treading water in a bucket. This is the third insect that I have saved from drowning recently. Do they not know it's water they are landing on or are they trying to get a drink and fall in?

My first thought on what insect was ladybird beetle but I did not find a match here on BugGuide. What is it? Can you tell if male or female? Is it pooping in the last picture or what is the behavior?