Jaguar vs reptile

"Yacare,Spectacled andBlack Caimams in Amazon forest and some  parts of the Pantanal;Jaguars  take all life-stages of these three species, including large adults and eggs."
"large anacondas and Boa Constrictors ,are also killed by Jaguars"
"Wild cats" Luke Hunter

Jaguar vs Melanosuchus niger

In September 1995, we found the remains of a female C. crocodilus (skull length 18.5 cm, estimated total length  1.3 m) adjacent to a depredated nest with the remains of 12 eggs scattered around the nest. In June 1999, we found a male M. niger 3.8 m TL that apparently had recently been killed by a jaguar. Based on the paw marks around the site, the caiman had been attacked by the jaguar while on a thick mat of floating vegetation in a canal located along the margin of Lago Mamiraua´. In August 2007, a camera trap set along a trail in the Mamiraua´ Reserve captured a photograph of a jaguar with the remains of a C. crocodilus in its mouth. The photograph was taken in low restinga forest habitat, approximately 30 m from the nearest water body, and the estimated size of
the caiman, between 1.2 and 1.5 m TL, is consistent with it being an adult female.
"Depredation by Jaguars on Caimans and Importance of Reptiles in the Diet of Jaguar"
Ronis Da Silveira , Emiliano E. Ramalho , John B. Thorbjarnarson , and William E. Magnusson 

El Jefe

“This was a young adult female about 230 pounds”

The Return of the Great American Jaguar

Removing the bear skull from its zip-lock bag, he shows it to Neils, an expert on black bears from her years studying them in Florida. “This was a young adult female about 230 pounds,” she says. Bugbee then removes the suspected jaguar scat, spritzes it with water, and reseals it in the plastic bag. He waits for an hour and then hides the moistened scat among the cactuses in the front yard. Then he fetches Mayke from her kennel and gives her the command, “Find the scat! Find the scat!”

Mayke systematically searches the yard, zigzagging back and forth with her nose to the ground, until a breeze gets up and wafts the scent toward her. She trots directly to the scat, sniffs it, sits down, looks at Bugbee and barks twice.

“It’s jaguar!” exclaims Neils. The hairs in the scat are later confirmed in the lab as black bear. This is the first recorded predation by a jaguar on a black bear, and as Neils points out, it occurred where the northern limit of the jaguar’s range reached the southern limit of the black bear’s range. “It was north against south, and south won.”

Bugbee sits down at his laptop, and finds the last photographs and videos of El Jefe. Where is he now? He could have been shot, or killed by a vehicle. An injury could have lessened his hunting powers, leading to death by starvation. He could be in another Sky Island mountain range. There have been rumors and several unconfirmed sightings of a jaguar in the Patagonia Mountains, not far from the Santa Ritas. It could be El Jefe, or the next young dispersing male from Mexico.

Jaguar vs Spectacled Bear

 Spectacled bears appear to avoid jaguar (Panthera onca), suggesting that jaguar might be considered a predator. The elevational ranges of these two species in Perú and Bolivia do not overlap on the  same mountain slope, but do for 900m of elevation if the entire Cordillera Oriental is considered.
Here, jaguar can occur up to 1,500m in elevation and spectacled bears can descend as low as 600m in elevation(B. Peyton unpubl. data).

"Spectacled Bear Conservation Action Plan" Bernard Peyton

Jaguar vs Green Anaconda