• Blog
  • Site Contents
  • Photo Galleries
  • MUSIC
  • ABOUT/CONTACT
Menu

Mark Johnston

  • Blog
  • Site Contents
  • Photo Galleries
  • MUSIC
  • ABOUT/CONTACT

Harris Hawk, Parabuteo unicinctus, one of the only raptors that hunts in family groups.

Photo of the day - 18 Apr 2016

April 7, 2016
In Nature photography Tags Harris Hawk, raptors
Comment

Goodbye, Winter!

Photo of the day - 17 Apr 2016

April 7, 2016
In Nature photography Tags ice
Comment

Jumping spider.  Smaller than your fingernail.

Photo of the day - 16 Apr 2016

April 7, 2016
In Macro photography, Nature photography Tags jumping spider, macro
Comment

Costas Hummingbird, Calypte costae.

Photo of the day - 13 Apr 2016

April 6, 2016
In Nature photography Tags hummingbird, Costas Hummingbird
Comment

Video of the day - 10 Apr 2016

April 10, 2016

Clark's Nutcracker tending nestlings

Clark's Nutcrackers get an early start on nest-building and egg-laying.  It's only April and here in Colorado there is still plenty of snow on the ground at the higher elevations where these birds are normally found.  But these three nestlings are already well along - and hungry.

The Clark's Nutcracker is a member of the crow family - some of the smartest birds on planet Earth. 

All Clark's Nutcrackers have a pouch beneath their tongues capable of holding more than a hundred pine seeds, their most important food source.  They carry and hide these seeds in the ground in caches of 1 to 15 seeds for later retrieval and consumption.  Studies have shown that a single Clark's Nutcracker can cache as many as 98,000 seeds in a season.  They store more than they actually need as an insurance against scarcity of other food sources and seed theft by other animals such as squirrels.

The surplus seed can germinate and grow into new trees, if the conditions are right. Through this activity of caching and over-storing, Clark's Nutcrackers play a role in perpetuating their own food sources and habitat.

However, just because they store so many seeds doesn't mean the Clark's Nutcracker loses track of them.  These amazing birds are able to remember the locations of seed caches with remarkable accuracy, months after they have stored the seeds, and even when the cache sites are buried under deep snow.

In Nature photography Tags Clark's Nutcracker, birds, behavior, nest
Comment
← Newer Posts Older Posts →