How to Grow Bluebirds by Susan Harris - Last Friday I rode shotgun through the Beltsville Ag Research Center in Marcia van Horn’s Ranger as she checked on some of her 175 nesting boxes for bluebi...
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A cloud of a class characterized by globular masses or rolls in layers or patches, the individual elements being larger and darker than those of cirrocumulus and smaller than those of stratocumulus. These clouds are of medium altitude, about 8000-20,000 ft (2400-6100 m).
[R]elatively thick skull with relatively spongy bone to cushion the brain; there is very little cerebrospinal fluid in its small subarachnoid space; the bird contracts mandibular muscles just before impact, thus transmitting the impact past the brain and allowing its whole body to help absorb the shock; and its relatively small brain is less prone to concussion than other animals.Incidentally, there are occasional glimpses of the red feathers on the belly, which is why it gets its name. That's not quite as much as a "duh" as you might think because it's rare to see the belly feathers.