Archive for the ‘Apple iPhone’ Category

Emerald dragonfly (female, oviposition)

January 2, 2012

The following “raw” video clip (unedited) shows a female Mocha Emerald dragonfly (Somatochlora linearis), laying eggs by the process of oviposition. The process typically lasts a few seconds to a few minutes.

This individual was spotted during a photowalk through the “Wildlife Sanctuary,” one of seven small parks in the community of Hollin Hills, Fairfax County, Virginia USA.

Video Copyright © 2012 Walter Sanford. All rights reserved. www.wsanford.com

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Common Whitetail dragonfly (teneral)

December 31, 2011

A teneral Common Whitetail dragonfly (Plathemis lydia, Libellula lydia), either a female or an immature male, spotted during a photowalk through Huntley Meadows Park, Fairfax County, Virginia USA. I spotted several of these dragonflies at the same time in the same location; they were easily spooked so it was difficult for me to shoot good photos of them using my iPhone 3GS.

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Photo 1 of 3 was cropped (and sharpened) to highlight the dragonfly; Photo 2 of 3 is the original photograph. Photo 3 of 3 shows a female Common Whitetail dragonfly for comparison with Photos 1-2.

Photos © Copyright 2011 Walter Sanford. All rights reserved. www.wsanford.com

Needham’s Skimmer dragonfly (female)

December 25, 2011

The following “raw” video clip (unedited) shows a female Needham’s Skimmer dragonfly (Libellula needhami) laying eggs by the process of oviposition. The female skims the water repeatedly, picking up drops of water that are used to flick fertilized eggs toward the shore. The process typically lasts a few seconds to a few minutes.

I spotted several Needham’s Slimmer dragonflies (both males and females) during a photowalk through “Paul Spring Park,” one of seven small parks owned and maintained by the Community Association of Hollin Hills, Fairfax County, Virginia USA. See “Needham’s Skimmer dragonflies (males),” one of my Posterous posts. Male Needham’s Skimmer dragonflies exhibit primarily red coloration; females exhibit primarily yellow coloration.

Video © Copyright 2011 Walter Sanford. All rights reserved. www.wsanford.com

Diptic: Dragonfly identification quiz/scavenger hunt

December 23, 2011

Regular readers of my photoblog should be able to identify the dragonflies shown in the following composite image. For each one of the dragonflies shown in the four-panel diptych, identify the type of dragonfly (common name plus genus and species) and its gender (either male or female). If you are unable to identify one or more of the dragonflies, then you may scavenge my photoblog in search of answers. (The correct answers will be provided in a follow-up post on 25 December 2011.)

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Tech Tips: The diptych (shown above) was created using Apple “Aperture” and “Diptic” app for Apple iOS mobile devices. Apple “Preview” was used to annotate Photo 1 of 2; Photo 2 of 2 is the original diptych.

Copyright © 2011 Walter Sanford. All rights reserved.

Diptychs of Autumn Meadowhawk dragonflies

December 11, 2011

The following gallery features photos of Autumn Meadowhawk dragonflies (Sympetrum vicinum) spotted during a during a photowalk through Huntley Meadows Park on 02 December 2011. It was astounding to see dragonflies so late in the year — completely unexpected! Male Autumn Meadowhawk dragonflies have red eyes and a red face, a brown thorax, a red abdomen, and red pterostigma near all four wingtips. Its body is approximately one-and-a-half to two inches (1.5 – 2″) in length.

These composite images, known as a diptychs, were created using Aperture and Diptic  app for Apple iOS mobile devices.

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Panels three and four (shown above, lower-left and lower-right) show a mating pair of Autumn Meadowhawk dragonflies. Odonata, an order of insects including dragonflies and damselflies, reproduce in three stages: in tandem; in wheel (sometimes called “in heart” for damselflies); and oviposition. The dragonflies shown in Panels 3-4 are “in wheel,” in which the male (red abdomen) uses claspers at the end of his abdomen to hold the female by her thorax while they are joined at their abdomens. All dragonflies and damselflies have a 10-segmented abdomen: male dragonfly secondary genitalia are located in segments two and three (2 and 3); female genitalia in segment eight (8).

Photos © Copyright 2011 Walter Sanford. All rights reserved. www.wsanford.com

Eastern Amberwing dragonfly diptychs

December 9, 2011
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The preceding gallery shows diptychs of an Eastern Amberwing dragonfly (Perithemis tenera) spotted during a photowalk through Huntley Meadows Park, Fairfax County, Virginia USA.

The diptychs (shown above), entitled “An Eastern Frame of Mind,” were created using Aperture and Diptic app for Apple iOS mobile devices. See full-size versions of the photos used to create the preceding diptychs: Eastern Amberwing dragonfly.

Copyright © 2011 Walter Sanford. All rights reserved.

Blue Dasher: three- and four-panel diptychs

December 5, 2011

The following gallery shows diptychs of male Blue Dasher dragonflies (Pachydiplax longipennis), members of the skimmer family of dragonflies, spotted during photowalks through Huntley Meadows Park.

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The diptychs (shown above), entitled “Dashing Blue Dashers,” were created using Aperture and Diptic  app for Apple iOS mobile devices. I still can’t decide whether I prefer a black- or white border — what do you think?

Related Resources:

See full-size versions of the photos used to create the preceding diptychs of dragonflies.

Photos © Copyright 2011 Walter Sanford. All rights reserved. www.wsanford.com

Diptic dilemna: Black or white border?

December 1, 2011
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Another “Hi-Res” Diptic (resolution = 2048 x 2048 pixels) of Slaty Skimmer dragonflies (Libellula incesta) spotted during photowalks through Huntley Meadows Park, Fairfax County, Virginia USA. The diptychs (shown above), entitled “Perching Slatys II,” were created using Aperture and Diptic  app for Apple iOS mobile devices. The color of the border is the only difference between the two Diptics — which color do you prefer, black or white?

The following gallery illustrates the workflow used to create the composite image in Diptic.

  1. Browse stock layouts; choose a layout (Image No. 1).
  2. Select photos (No. 2).
  3. Select the source of the photos to add to the layout; add photos (No. 3).
  4. Add effects; tap “Border” button (No. 4).
  5. Select border options (No. 5).
  6. Export Hi-Res Diptic (No. 6).
  7. Save output to “Saved Photos” (No. 7).
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Photos © Copyright 2011 Walter Sanford. All rights reserved. www.wsanford.com

A diptych of dragonflies

November 27, 2011
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A diptych of Slaty Skimmer dragonflies (Libellula incesta) spotted during photowalks through Huntley Meadows Park, Fairfax County, Virginia USA. The diptych (shown above), entitled “Perching Slatys,” was created using Diptic  app for Apple iOS mobile devices.

Related Resources:

See full-size versions of the photos used to create the preceding diptych of dragonflies.

Tech Tips: The source photos were post-processed using Apple “Aperture,” a professional-grade tool for organizing and adjusting photos, before they were imported into “Diptic” app. Selected images were cropped to fit perfectly within the borderless frames I chose to use in “Diptic.” In order to create a “Normal” resolution Diptic (1024 x 1024 pixels) like the one shown above, I used “Aperture” to crop photo tiles from the source images in the following sizes: 512 x 512 pixels (square); 512 H x 1024 W pixels. Next, I used iTunes to sync the photo tiles to my iPad. Finally, I launched Diptic, selected the photo tiles, and added black and white borders with a width of 10 pixels.

Photo © Copyright 2011 Walter Sanford. All rights reserved. www.wsanford.com

Slaty Skimmer dragonfly (male)

November 10, 2011
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A Slaty Skimmer dragonfly (Libellula incesta), one of the larger skimmers, perched on a twig. Notice that the Slaty Skimmer perches on four of six legs, with the two front legs curled around its head. This individual is a mature male, as indicated by its dark bluish-black body and black head. Photo 1 of 2 is a copy of the original photograph, cropped to highlight the dragonfly; Photo 2 of 2 is the original photograph.

I spotted this dragonfly during a photowalk through Huntley Meadows Park, a 1,425 acre wetland area in Fairfax County, Virginia USA.


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