Tuesday, August 13, 2013

Northern Mockingbird Part 2-Defender of Hearth and Home



 As much as the Mockingbird is known for its “many tongued mimicking” that we talked about in the last blog, it is also infamous for it’s pugnacious defense of not just it’s nesting site but also its wintering territory.    Considering they can have up to 4 broods in the summer, and then defend their food supply area in the winter, there is hardly a season when you won’t find the mockingbird sailing out of it’s tree to attack something or other. 

According to John Tveten in “The Birds of Texas”, one of the selling points on making the Mockingbird the State Bird in 1927 was that it was “…a singer of distinctive type, a fighter for the protection of it’s home, falling if need be, in it’s defense, like any true Texan…”  “Remember the Alamo” apparently extends to TX birds too!



Most Mockingbirds don’t take it that far, but it has been noted in “Audubon’s Field Guide to the Birds” that they can end up injuring themselves mortally, not when fighting another mockingbird, but when taking on their image in a car mirror or window.  “Man, that other mockingbird won’t quit attacking!”

 When I came house hunting in Texas , I parked my car near some cedars that must have housed a nest, for each time I came out, my mirrors and the side of the car were coated in Mockingbird droppings.  It was so frequent that I wondered if this poor bird would die of dehydration if he kept it up.  I should have covered the mirrors with a plastic bag saving myself a lot of clean up, and the mockingbird a lot of lost fluids.

Mockingbirds mount the fiercest defense when their offspring are in the fledgling stage, when other predators see them as the perfect mid-day snack.  This is where you get the pictures of mockingbirds attacking hawks, cats, dogs and people who come to close. 

The University of Florida did a study on this behavior and sent out intrepid students to go and touch the nest.  That didn’t go over well with the parent mockingbirds and so we have this iconic picture of a mockingbird attacking the “touchee” .  What they discovered was, it only took 60 seconds for the mockingbird to imprint this person on their memory.  The one being attacked in this picture is the one that had touched the nest while the people around her were left alone.  “Smart as crows” you might say.  The Cornell student who climbed up to crows’ nests to mark the eggs had his car attacked anytime he drove through Ithaca.  Not such “bird brains” after all!

Mockingbirds also have been seen doing this “wing-flash” strut, walking a few steps, then up with the wings, and then walking on.  No one knows why yet,: to flush insects? To scare rivals, yet none seem to be about.  Not all questions have answers.  They do spread their wings and tail feathers in flight to impress the ladies, but this seems different.

The other behavior I have yet to see but I am watching for, is when two males meet at their territory lines, and they start this sidestepping dance, hop, side step- bob heads; just their way of saying, “This far and no farther”.  

Fall is coming, and they will start a whole new round of chases and singing, as the pair of mockingbirds will be defending their winter food supply.  Females go after intruding females, males after males.  And as the mockingbird has become more and more , we all have a chance to keep on the lookout for this one. 

I don’t know about you, but for me there is so much more to bird watching than just noting what species you are seeing.  What are they doing and why?  That’s the more interesting question in my book.  And by the way, the mockingbird that was going through the “bird downloads” a week ago, is as silent as the grave now.  This is probably the third batch of mockingbirds this season!  My peaches don’t stand a chance.  Ok, enough about Mockingbirds…on to other things next time.

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