Wednesday, September 16, 2009

Five old maps

I have an old book called A Picture Map Geography of the United States by Vernon Quinn which just entered the public domain this year (most recent edition was 1959). It's got some funky old maps that are kind of neat to look at. Clicking on each map will take you to a bigger version of it. Here's the first five of them:

new_jersey

maine

pennsylvania

delaware

arizona

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Wednesday, June 4, 2008

Horseshoe crabs of Delaware Bay

Yesterday, I went up to Delaware Bay to help the Nature Conservancy count spawning horseshoe crabs. I carpooled with my student Efrain and his friend Dennis. We did some birding at Cape Henlopen State Park, then had dinner and a few crafty craft beers at the Dogfish Head Brewpub in Rehoboth Beach (I had crabcake, natch.), and then headed out to Big Stone Beach for the main event: the spring tide and the new moon mean spawning horseshoe crabs (Limulus polyphemus) by the thousands. We were helping the Nature Conservancy tally up the numbers of male and female crabs. You can learn more about horseshoe crabs at this excellent website. Or you can just look at these images:

horseshoe_08

horseshoe_09

horseshoe_13

horseshoe_18

horseshoe_12

horseshoe_14

horseshoe_16

horseshoe_17

horseshoe_19

horseshoe_21

horseshoe_23

horseshoe_06

horseshoe_04

...You get the idea. Other images on the Flickr photostream. Joining a couple of medical doctors from Delaware (well, originally from Virginia, but stationed in Delaware), we surveyed the beach using TNC's rope and square-meter protocol. The weather turned cold and rainy, but we kept it up, and saw a lot of crabs. I estimate that altogether, we saw somewhere around 5,000 crabs. Pretty cool: one of the great wildlife concentrations in the world, and it's only 2.5 hours from DC. Next up: sandhill cranes on the Platte River in Nebraska, or maybe polar bears in Churchill, Manitoba...

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