[bcbirdclub] Nature on the Eastern Shore

  • From: wdunson@xxxxxxxxxxx
  • To: wad4@xxxxxxx
  • Date: Mon, 22 Sep 2014 11:19:25 +0000 (UTC)

During a family trip to Baltimore we took the opportunity to visit some 
favorite spots along the Eastern Shore of VA, especially Kiptopeke and 
Chincoteague, VA. This is as far east as you can go without getting your feet 
in salt water and is a marvelous comparison with our summer home in the Blue 
Ridge mountains. It is coastal plain habitat, very flat, on a peninsula that 
lies on the eastern side of the ancient drowned river valley of the Susquehanna 
River, now called the Chesapeake Bay. Some animals and plants are similar to or 
even the same as the montane species, but others are distinct. 

I am always excited to see persimmon trees in fruit since as a N America 
outlying representative of the typically tropical ebony family, they seem 
exotic. The wild fruit is strange, very astringent when green and not very 
pleasant to my taste when ripe. This is a good example of how fruits, which are 
designed to be eaten to disperse the seeds, discourage animals from eating them 
until they are fully ripe and the seed is viable. After all, a plant has no 
reason to feed animals a tasty fruit unless the animal reciprocates by 
dispersing the ripe seeds. 

When you visit the beautiful ocean beach you do not likely have your gaze 
directed downwards. But if you do you may spot an extraordinarily camouflaged 
grasshopper that resembles the dry sand very closely to avoid predation. On the 
beach where the surf breaks there is a strange crustacean, the mole crab, that 
specializes in burrowing and feeding on detritus. It is avidly sought after by 
shorebirds such as the willet which here has captured a mole crab so large that 
it is having difficulty in swallowing it. The specialized inhabitants of the 
surf zone may seem to be at risk from sea level rise, but in fact the beach 
will move towards the land as the water level rises, and this process of beach 
migration both in and out has happened many times before during geological 
time. 

Behind the coastal dunes there are stands of goldenrod which attract 
butterflies such as the gray hairstreak. This is a particularly interesting 
butterfly since it has a false head on the rear of the wings. This particular 
individual has a hole in the wings just above the fake head which shows that 
the ruse was successful in saving its life from an attack by a bird. Pools of 
low salinity water occur behind the dunes and these are a somewhat surprising 
place to find amphibians such as this Fowler's toad. It closely resembles the 
American toad but has more warts inside each dark patch, has a very different 
call, and breeds during the summer and not the spring. 

Along salt water creeks and in Spartina marshes you may see the elusive clapper 
rail foraging at low tide. They are quite shy but surprisingly common and leave 
large footprints in the mud. On higher ground next to the salt marsh I found a 
pair of bald eagles which are likely breeders in the area. In contrast there 
were numbers of falcons migrating south overhead; this merlin stopped for a 
brief rest during this seasonal journey to the south. An unusual inhabitant of 
the pine forests on Assateague Island is the gray Delmarva fox squirrel, a 
unique race that developed on the semi-isolated peninsula, but is now in 
decline due to conversion of the forests to farm land. 

Travel is a great teacher for the naturalist. It shows us how different species 
adapt to variable climates and topography and refreshes our enthusiasm for new 
adventures in studying our wild world. 

Bill Dunson 
http://lemonbayconservancy.org/news-blog/nature-notes-by-bill-dunson/ 



Attachment: Persimmon fruit Chin NWR 9.18.14 Bill Dunson IMG_2904 aa.jpg
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Attachment: Grasshopper imitates beach sand Chin NWR 9.18.14 Bill Dunson IMG_2894 aa.jpg
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Attachment: Hairstreak gray Rumbly Pt MD 9.20.14 Bill Dunson IMG_2966 aa.jpg
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Attachment: Fowlers toad Chin Isl 9.18.14 Bill Dunson IMG_2908 bb.jpg
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Attachment: Clapper rail Chin Isl marsh 9.20.14 Bill Dunson IMG_2941 aa.jpg
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Attachment: Eagle pair at Chin NWR 9.18.14 Bill Dunson IMG_2819 aa.jpg
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Attachment: Merlin at Chin NWR 9.18.14 Bill Dunson IMG_2847 aa.jpg
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Attachment: Willet eating mole crab at Assat Isl 9.18.14 Bill Dunson IMG_2861 aa.jpg
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Attachment: Fox squirrel Delmarva at Chin NWR 9.18.14 Bill Dunson IMG_2852 aa.jpg
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