Cattle are a common sight in Indian cities. [CLIP: Sound of honking][CLIP: “From blocking traffic to damaging greens in residential colonies, untended cattle have become a nuisance in Delhi.”]And the nuisance extends beyond Delhi. “All these problems are very intense in many Indian cities.”Atanu Pati studies animal behavior at Pandit Ravishankar Shukla University in Raipur in central India. He and his colleagues wanted to find out just how many cows lived on the streets of Raipur. “We used two methods: one is a direct head count.”The other was photographic: they’d take pictures in those same grids over a few days and count the cows they may have missed.