Saturday, July 25, 2015

Amazing Lesser Nighthawk Mother

Lesser nighthawks, which are very common in the Tucson area this time of year, are often seen soaring over the desert in the evening. During the day, they can occasionally be found roosting or nesting on the desert floor. Yes. Nesting. On the bare ground, often with no more shade than a creosote bush. 
As this photo shows, they are very well camouflaged, and that apparently serves them well.

Despite their name, nighthawks are not raptors; they are insect-eaters, and soar in the evening, gathering flying bugs into their very wide mouths with the help of "whiskers." The young are semi-precocial, which means that after they are hatched they do not need the constant care of a parent, as many nesting birds (doves, robins, etc.) do, but can move about and hide. They still depend on their parents, however, to bring them food until they are strong enough to fly on their own. 

When a birder and I saw the nighthawk today on our bird walk, she seemed fidgety. We wondered if it was due to all the bugs brought out by the extreme humidity, but apparently she was just getting ready to resettle herself and turn her eggs:

 Which she did, and which we were lucky enough to observe and videotape. By the way, birds such as nighthawks and doves that nest in the desert sun in the summer do so to keep their eggs COOL.

Here's the video:
 

4 comments:

  1. Aww, those are such neat birds! Thanks for sharing, KL. I've never seen a nighthawk in the daytime. Looks like a hot nest!

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    1. Thanks for your comment, Carol! I believe they roost on the ground even when they aren't brooding eggs. And yes, it's hot! Just a teensy bit of shade from a creosote bush. What a strange way to live.

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  2. Explain, please, how this keeps the eggs COOL. Is the ground temperature cooler than the air, perhaps?

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    1. Her body temperature is cooler than the direct sun. This strategy is also used by doves and other birds that sometimes or always brood in the open.

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