are you sure? i once opened my pantry window the first time after 1 or 2 weeks. behind it is a wall with holes to keep the food cool without fridge. on the window sill there are some boxes with kitchen cleaners, solvents and other toxic household chemicals. i saw a nest with young birds right next to the chemicals and retarded as i am i thought it would be a good idea to remove the bottles. i didn't touch the nest but when i took a peek next day all of the birdlings were dead. so i guess the parents abandoned them maybe because they saw someone had altered the surroundings?
Germany