i don't know if i am doing this right but.... i have the miracle of finding a new hummingbird nest just outside my 2nd story window. i have been watching her sit on the next for 2 weeks, until yesterday i noticed she was moving around the nest (perched on the side and flying around). i watched her go back and forth all day and i assumed the birds had hatched and she was searching for food. she has not been seen for 24 hours and today i death defyingly hung myself out the window to take a peek.... at an empty nest. what happened?