Salesforce CEO Marc Benioff is having a busy week, what with Dreamforce taking over downtown San Francisco and a second mountain lion sighting near his Pacific Heights home in the past five days.

Benioff shared a second video showing a mountain lion walking past his home about 5 a.m. Wednesday.

"The San Francisco mountain lion walked by my house near the Presidio at 5am last night!" Benioff wrote on Twitter later that afternoon. "City, Park police, and national park service notified!"

Benioff first posted security footage of the initial mountain lion sighting last Saturday on Twitter and YouTube. So far, there has been one other report of a mountain lion Saturday near 27th Avenue and Lake Street, but San Francisco Animal Care and Control (ACC) spokeswoman Deb Campbell said the agency was unable to confirm it. It's currently unclear whether this is the same mountain lion as the one Benioff recorded Wednesday.

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Spotting a mountain lion in San Francisco is unusual, said Peter Tira with the California Department of Fish and Wildlife, but mountain lions roam through just about every county in the state — residents are merely spying these creatures more, due to technology.

"For San Francisco, it's definitely an uncommon occurrence (to see a mountain lion), but mountain lions are around ... they're (just) very elusive, they're very fearful of people and they do a very good job at staying out of our way and avoiding us," Tira said to SFGATE.

"What we have now is, we have trailhead cameras and security cameras, so we're seeing more mountain lions captured on our devices and we have them walking past our houses ... but now we see them more often."

Photo: Screenshot/Video Courtesy Marc Benioff Photo: Discovery Channel Photo: KSBW Photo: KIYOSHI OTA Photo: David Allen/Got Snakes? Photo: BOB OWEN /San Antonio Express-News Photo: Janek Skarzynski, AFP / Getty Images Photo: Contributed Photo Photo: Chris O'Meara, STF Photo: Courtesy Photo Photo: Charles Krupa, AP Photo: John Hanna Photo: Courtesy Point Reyes National Seashore Photo: Santa Monica Mountains National Recreation Area Photo: Santa Monica Mountains National Recreation Area Photo: California Dept. Of Fish And Gam / AP Photo: Katharina Pierini / Special To The Chronicle Photo: Steven Bobzien / East Bay Regional Parks Photo: Steve Bobzien / Special To The Chronicle Photo: Courtesy Point Reyes National Se Photo: National Park ServiceA Photo: AP 2004, AP

Mountain lions are more known to frequent the Peninsula, and San Mateo and Santa Cruz counties, Tira said. With a suspected population between 4,000 to 6,000 mountain lions in California, coupled with the fact that the felines have such a huge range — anywhere from 10 to 400 square miles, according to DFW — an occasional sighting in San Francisco does happen, however, when they wander up the coast.

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Campbell and Tira said residents merely need to take some common-sense steps to protect themselves and not let mountain lions be opportunistic with family pets. Campbell said residents should be wary, but not overly concerned, adding, "They're shy animals, as far as we know."

Tira agreed.

"You want to be aware, kind of like the situation with coyotes, and you don't want to provide any attractant to suburban areas in the city," he said. "If you have small pets, you want to keep tabs on them, especially in the morning, and not leave them unattended."

Both agencies continue to track mountain lion sightings, and residents can report them to ACC emergency dispatch at (415) 544-9400. For mountain lion safety tips, head to the DFW site here.