little green sweat bee

Who was slowly making his way around this flower. Hastily photographed on my way to the pool for the possibly last time this year. 6Pm and 80 degree water - cold for me on a cloudy day.Better than the first few times in it this year in June , but one gets used to the 85 degree water temps in July and spoiled. 
Excuse me it is very late and my cat is absolutely yelling at me - he wants crunchier and bed