Rahul Arora - Mahendru Enclave, (Opposite Model Town 3) Mahendru Enclave, (Opposite Model Town 3) North West Delhi Delhi

I live in Mahendru Enclave, it's opposite Model Town 3 and 1 km before Azadpur.
My house used to have a huge reserved forest kind of park behind me house.
But somewhere in 2004 Metro was allotted that place and they had to cut down all the trees, since then I have rarely seen any sparrow visiting my home.
Before the cutting of trees I did use to see them on my roof but post tree cutting the sighting has dropped. There is still a large portion of forest kind of park in the rest of the half of the area but I never saw a sparrow till now, except for a few rare occasion.
I appreciate this project and would like to contribute in it in any way.
I was thinking to install a small sparrow house kinda thing on my roof, if you could initiate something like that, may be it's a good business idea that you start selling those sparrow house online and provide instructions that how sparrows could be provided an environment to live around our locality.
Thanks