Known to be largest owls in North America, Great gray owls are commonly found with a wide range in Canada and at the taiga forests in Asia. But when we talk about Great gray Owls in Yosemite, these are actually the subspecies of these owls and had separated from the main population during an ice age 30,000 years ago.

Considering the group in Yosemite, here is a genetically distinct population. Today, only 200 Great Gray Owls live in Yosemite and it seems to be reducing further. According to researchers, the main reason behind this decreasing trend could be a difference in their habitat: the way they build their nests, migration process and the food they get to eat. So, it is basically the habitat destruction that is killing the species slowly.

To find out that what exactly these birds need to survive, researchers are taking help of a technology to fix at their trees which will record their voices and help them understand their demands.

Owls have relatively low-frequency calls; therefore, this technology has been programmed with special software that will pick up the voice of these birds only. It is able to pick out males and females from juveniles, and even can identify nesting females asking for food.