June 12: Tigers are a rarity and spiders are dime a dozen. That has not prevented some forest officials from preferring the latter at the expense of the former. The Nagarjunasagar Srisailam Tiger reserve (Rajiv Gandhi Wildlife Sanctuary) has been witnessing a steep fall in the number of big tigers or the panthera tigris. However, the magnificent animal's official protectors are not too bothered about this and are perfectly happy discovering new kinds of spiders and herbs.