Photo of the day

Cesar Millan walking dogs in the park. This is from Cesar Millan: Better Human Better Dog Season 4.

Cyril holds a massive redtail catfish waist-deep in Bolivia at night. This is from Last of the Giants: Wild Fish Season 3.

A young water buffalo after taking its first mudbath on the rewilded Island of Ermakov. The buffalo will create new water channels which can be used by other aquatic species. This is from Europe's Wild Places (Mashup, Seasn 1).

Cesar Millan guiding Lincoln in an exercise with a new dog. This is from Cesar Millan: Better Human Better Dog Season 4.

A European otter. This is from Wild Mediterranean.

The marsh frog is the largest frog native to Europe and belongs to the family of true frogs. Is it abundant in the Danube Delta and is prey for a large number of species from herons to crow and even white-tailed eagles. This is from Europe's Wild Places (Mashup, Seasn 1).

Cyril holding large barracuda at night. This is from Last of the Giants: Wild Fish Season 3.

An Iberian lynx in a meadow. This is from Wild Mediterranean.

Multiple rounds of ammo were placed on an inspection table after they were discovered in a suspect's belongings in El Paso, Texas. This is from To Catch a Smugler Season 7.

A European mantus nymph. This is from Wild Mediterranean.

Cesar Millan talking to clients. This is from Cesar Millan: Better Human Better Dog Season 4.

CBP Officers Islam and Hundal use knives to inspect a passenger's boxes, searching for customs violations at the Dulles International Airport in Dulles, Va. This is from To Catch a Smugler Season 7.

The Iron Gates Gorge. The Danube river has carved its way through the limestone rock over thousands of years. This is from Europe's Wild Places (Mashup, Seasn 1).

Cesar Millan reacting to a client. This is from Cesar Millan: Better Human Better Dog Season 4.

An Iberian lynx. This is from Wild Mediterranean.

Air Enforcement Agent Murray is holding his helmet as he walks across a tarmac to a CBP air vehicle in San Diego, Calif. This is from To Catch a Smugler Season 7.

An Ibex looking over cliff at the Mediterranean Sea. This is from Wild Mediterranean.

Cesar Millan and Angela playing with her dog. This is from Cesar Millan: Better Human Better Dog Season 4.

Cyril holding a barracuda in the Bijagos Archipelago. This is from Last of the Giants: Wild Fish Season 3.

Italian wolves in snowfall. This is from Wild Mediterranean.

A stack of undeclared currency was placed in an evidence bag on an inspection table after it was found in a suspect's belongings in El Paso, Texas. This is from To Catch a Smugler Season 7.