Vipul Bhatnagar - Jim Corbett National Park Ramnagar Uttarakhand

Recently I visited Jim Corbett National Park, I was pretty sure that I shall get the chance to see so many house-sparrows but in the 2 days trip, I have seen only 1 house sparrow...It was strange and I was shocked that even in jungles house sparrows are missing slowly.....
I do not know what to do but I put a small water mug in front on my house for birds...