Holocene Earth ] Back | Next >

 North America

Mean atmospheric O2
 21% of all gases

Mean atmospheric CO2
 0.035% of all gases

Average temperature

Holocene Earth - A Western Screech Owls grasping a captured mouse at an electric substation at night - Natural History Illustration Geologic Time Scale

 Era: Cenozoic
  Period: Quaternary
   Epoch: Holocene*
    Age: Undefined


Western Screech Owls & electric substation

Owls of the species Megascops kennicottii, known as Western Screech Owls, congregate around an electric substation in modern day Southwestern North America.

The Western Screech Owl is a small owl with a length of 8.5 inches and wing span 0f 20 inches. Their diet consists mainly of small mammals, birds and large insects. They are active at night or near sundown, using their excellent hearing and night vision to locate prey.

An electric substation (or electrical substation) is a subsidiary unit of an electricity generation, transmission and distribution system where voltage is transformed from high to low, or vice versa, using transformers.

* Some experts argue that Holocene ("entirely new") should be replaced with the term “Anthropocene” ("man new") because humans have caused mass extinctions of plant and animal species, while distributing others across the globe, polluted the oceans, and altered the atmosphere.


Copyright Walter B. Myers. All rights reserved.

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