A Nesting Bald Eagle on the Potomac

A wall of washed-down tree trunks at the base.

The nest is the small dot high in the tree at left, across the way. 

Bald Eagles in the nest are a hard shot to get in part because the nests are very high and very large and deep, and if a bird can be seen at all, it's often just the head. Shooting from right below the tree will generally get you nothing, so you have to be far back which means trees will likely obscure the view.

This nest was on the upriver point of 169-acre Van Deventer Island in Montgomery County, Maryland, near Leesburg, Virginia. 

I beached the kayak on a very soft mud flat to gain a little stability for a very long shot, the results of which are above. Bobbing kayaks are not a great platform for handheld cameras shooting long distances.

Van Deventer Island is just downstream from Selden Island (408 acres) which is part of the Janelia Research Campus owned by the Howard Hughes Research Institute. There is no admittance to the island (it was closed to the public after a few malaria mosquitoes turned up) but Wikipedia tells me that the mice, flies, and small fish raised for research by the Janelia Research Campus are maintained by robots as well as a few humans:

An accredited vivarium houses laboratory animals including zebrafish, mice and rats. Support staff assist with routine care, breeding and surgeries. Routine care is aided by automation. Several fly flipping robots help maintain Drosophila stocks by transferring them to vials of fresh food. Two robot arms aid in the sanitation of mouse cages. One arm picks dirty cages from a stack and inserts them into an autoclave, the other removes sanitized cages and stacks them.

Cool! 

And what does this have to do with terrier work? 

Surely you know the story of Jack Black and the Wistar rats?  No?  Check it out here.