I have only really had an interest in watching birds(and other wildlife) since I took up photography not so long ago, early 2017. But I can remember as a child seeing Sparrows on a regular basis, up and down the street "Spuggies" as we used to call them round here. Sadly now I hardly see any locally, as few in the hedge at the bottom of the street....
THE HEDGE!!! Yes, most gardens aren't actually gardens anymore, they are sterile extensions of our home. Fenced in, turfed or worst paved over and some pretty(non-native) flower that maybe smell nice. Wildlife needs hedges, places to hide and be able to pass from garden to garden, they need food starting at the very bottom of the food chain with native pollen producing plants to attract the insects which in turn will attract the birds.
Basically what I am trying to say is everyone can and needs to help nature, given time it is amazing and can heal. You don't have to go wandering into the middle of nowhere or somewhere exotic. It starts at home.
It is the humble little Sparrow that has made me really notice the impact we are having, what bird/animal is missing from your childhood?