They are asked the precise location, the habitat, sparrow presence or absence and optional information about things like locations of nests, amount of green space, and so on. The campaign, which runs till May 31, aims to build a database of information about sparrows in India, birds that have declined steadily but have not received much attention. Check out the website which has all the information you need in an easy to read format, the form is right on the homepage and there are tons of interesting tidbits spread throughout the site.