Swifts die?

Swift nest box empty for first time in 2023 after many years of whistling and nesting in summer. Is the reason the insect mortality caused by agricultural poisons?
Swift nest box 2023 empty for the first time after many years of whistling and nesting in summer. Is the reason the insect die-off due to agricultural poisons?No, this year they came again, but later.
Swift nest box empty for first time in 2023 after many years of whistling and nesting in summer. Is the reason the insect mortality caused by agricultural poisons? No, this year they came again, but later.