Mommy said to say that hummingbird poo looks like thicker sugar water and just as sticky. She doesn't want anybuddy to know... but she is always bare foot and goes onto the deck a LOT. She has seen them poo over by the feeder and on the floor while hovering AND on the window, so...unfortunately she speaks from experience. She has said if a hummingbird does it, whatever it is, it's alright.
She also said that after the nectar she cooks for them is cooled, it immediately goes into the fridge, capped, and there it waits till the hummingbirds need a refill. It's best to change the nectar every third day, fourth tops. Especially when it's hot and it could begin to spoil or grow mold. Mold is a terrible sickener of hummingbirds. Clean the feeder at least once a week and don't forget their drinking ports. They get clogged. She measured 1 cup of cane sugar and 4 measured cups of water--never honey and never artificial sweetener. Ever. You'll sicken them and they may die. Bring to a boil. Take off the heat and allow to cool enough to put in the fridge. Mommy uses a glass juice jar.
I patrol for them and keep them safe. Ahem.
Hope you don't mind my annual hummingbird help again. Mom and I love them so much.
Mom has a thousand more steps to make to meet her goal. There were too many events where she goes to walk to keep a sustained walk going long. She will make it I'm sure.
Mom puts these under the feeder for the hummer's added enjoyment. She took this picture with her phone on yesterday's walkie.