Sparrows feed on goldfish

A homeowner in the United States recorded a rare sight when a red sparrow fed the goldfish food as if its children.

After the story of the bald eagle family in Canada nurturing orphans for six weeks spread online, scientists say there are many strange situations in nature among the relationships between species. animals seem to be unable to live together. One such example is the blackhead cardinal that feeds on goldfish in the US, according to National Geographic.

Black-headed red finches feed on goldfish in America.(Photo taken from the clip).

The sparrow video jumps along the pond and drops the seed for the fish that are open to eating Lou Ann Pence, a resident of Illinois, USA, sharing on YouTube in 2010. Pence said the red sparrow replied Get into the pond 6 times a day to feed the fish.

Experts offer a number of different theories about why birds feed food to a completely different species."My speculation is the open mouth shape of goldfish on the water that looks similar to the size and shape of the young bird preparing to bite. That motivates instinct to feed the chief bird. " Christina Riehl, biologist at Princeton University, USA, explains.

Young birds have not left the nest often have a colorful beak like bright red and yellow. The act of opening the mouth of the baby becomes the focus of attention for the parents. It is a visual hint that means "Feed me!" , according to Riehl.

Red finches feed goldfish.(Video: YouTube).

"It's an interesting demonstration of how simple stimuli can promote instinctive behavior, even in seemingly irrelevant situations , " Riehl said.

Riehl said that feeding fish is a waste of time for the red sparrow. But from the fishes' side, they can happily accept free meals, according to Kevin Roche, a biologist at the Czech Academy of Sciences. Roche said the carp, which includes goldfish, is very smart and can remember areas with abundant or frequently offered food. They rise to the surface of the water to feed on insects and other prey, while also inhaling more oxygen.