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Dragonflies & Damselflies Page 8

Image Taken on 16 Jul 2009 at 11:03    Image of day on 21 Aug 2009

After the indoor shoot we took her out for release and took some more studies in sunlight until she flew off. This detail is looking from the top of the head (eyes at the bottom) down the face at the top.
We estimated the number of eye segments at 30,000, couldn't believe it, but then found a reference to an exact count for the 'American Common Green Darner' at 28,672 in an excellent UK book by Steve Brooks ISBN 0-953-13990-5 page 8.
The cells do not form images (unlike the ridiculous Hollywood and nature documentary illustrations) so that IS the resolution - about 10% of a 'VGA' (640x480) colour monitor but of course wonderfully sensitive to movement, colour vision including UV, and very robust. According to the book, 3 additional eyes in a triangle at the top are very sensitive to light and are directly used for orientation in flight.


Ref: 20090821_db1_20090716_1103_005 brown hawker dragonfly female head detail (web crop 2)(r+mb id@576).jpg


Image Taken on 30 Jun 2018 at 13:52    Image of day on 22 Aug 2018

A female Brown Hawker Dragonfly flying above.


Ref: 20180822_df3_20180630_1352_522 brown hawker dragonfly female in flight (1st of 2018)(r+mb id@768).jpg


Image Taken on 28 Jul 2011 at 18:06    Image of day on 09 Sep 2011

This Brown Hawker Dragonfly female was having great time feeding on midges - you can see one here hanging out of the bottom of her mouth.


Ref: 20110909_df1_20110728_1806_086 brown hawker dragonfly female in flight with midge in mouth (crop)(r+mb id@576).jpg


Image Taken on 16 Jul 2009 at 11:01    Image of day on 21 Aug 2009

This is a Brown Hawker dragonfly female flapping her wings as she clambered up a hawthorn twig during a photo-shoot to photograph her in flight (but the flight images didn't capture the 3-D feel).


Ref: 20090821_da1_20090716_1101_128 ft1 brown hawker dragonfly female on hawthorn twig (web crop)(r+mb id@576).jpg


Image Taken on 26 Jul 2012 at 12:44    Image of day on 01 Sep 2012

Another view, this time from the side, before she departed.


Ref: 20120901_p10_20120726_1244_918 brown hawker dragonfly female side view hanging in hedge (crop)(r+mb id@768).jpg


Image Taken on 31 Aug 2012 at 13:35    Image of day on 11 Oct 2012

A bit of sunshine on not too-cold days bring the dragonflies out - mostly on feeding hunts over the long grass.


Ref: 20121011_df1_20120831_1335_355 brown hawker dragonfly in flight (crop)(r+mb id@432).jpg


Image Taken on 31 Aug 2012 at 13:37    Image of day on 11 Oct 2012

A bit of sunshine on not too-cold days bring the dragonflies out - mostly on feeding hunts over the long grass.


Ref: 20121011_df1_20120831_1337_434 brown hawker dragonfly in flight (crop)(r+mb id@768).jpg


Image Taken on 05 Aug 2012 at 14:25    Image of day on 14 Sep 2012

The Brown Hawker Dragonflies come out and hunt over the meadow as soon as the afternoon sun shows his face.


Ref: 20120914_df1_20120805_1425_114 brown hawker dragonfly in flight (crop)(r+mb id@768).jpg


Image Taken on 19 Jul 2015 at 15:34    Image of day on 19 Sep 2015

Flying across the wind keeping approximately the same distance from us before turning towards us. Here is part 1 of the sequence.


Ref: 20150919_df3_20150719_1534_137-142 brown hawker dragonfly in flight 01-06 of 11 (accurate montage @ 7fps)(r+mb id@1024).jpg


Image Taken on 19 Jul 2015 at 15:34    Image of day on 19 Sep 2015

Flying across the wind keeping approximately the same distance from us before turning towards us. Here is part 2 of the sequence.


Ref: 20150919_df3_20150719_1534_143-147 brown hawker dragonfly in flight 07-11 of 11 (accurate montage @ 7fps)(r+mb id@1024).jpg


Image Taken on 06 Aug 2020 at 17:58    Image of day on 10 Sep 2020

The middle image in more detail.
The damaged wing is very typical of the insect after a few days in the sunshine. Damage can get much worse than this before it has any impact on ability to fly well.


Ref: 20200910_df3_20200806_1758_306 brown hawker dragonfly in flight 2 of 3 (crop)(r+mb id@432).jpg


Image Taken on 06 Aug 2020 at 17:58    Image of day on 10 Sep 2020

The Brown Hawker Dragonfly is well named - even their wings are tinged brown. Here is one flying by taken at about 7 fps.


Ref: 20200910_df3_20200806_1758_305-307 brown hawker dragonfly in flight @7fps 1-3 of 3 (accurate montage)(r+mb id@1024).jpg


Image Taken on 19 Jul 2015 at 15:43    Image of day on 19 Sep 2015

This Brown Hawker Dragonfly was flying into the strong wind giving us a much closer spacing in this accurate montage. The flight appeared level to the eye, but you can see it wasn't!


Ref: 20150919_df3_20150719_1543_393-399 brown hawker dragonfly in flight into headwind 1-7 of 7 (accurate montage @ 7fps)(r+mb id@1024).jpg


Image Taken on 23 Jul 2012 at 13:05    Image of day on 01 Sep 2012

This male Brown Hawker Dragonfly has just launched into flight. The strange pod on the left is the seed head of a Flag Iris.


Ref: 20120901_da1_20120723_1305_056+1547_175_ft1 brown hawker dragonfly in flight with flag iris seed head (montage)(r+mb id@1024).jpg


Image Taken on 05 Aug 2012 at 14:31    Image of day on 14 Sep 2012

Hawker Dragonflies often hang in bushes where they are very difficult to find unless you see them land. Every time the camera lost position it was a struggle to find the insect again from only a couple of metres away.


Ref: 20120914_df1_20120805_1431_178 brown hawker dragonfly male camouflaged on dead leaf (crop)(r+mb id@576).jpg


Image Taken on 18 Jul 2014 at 12:34    Image of day on 24 Sep 2014

A male Brown Hawker Dragonfly flying up the path we were standing on.


Ref: 20140924_df2_20140718_1234_107-109 brown hawker dragonfly male in climbing flight towards camera @ 7fps 1-3 of 3 (accurate montage)(r+mb id@768).jpg


Image Taken on 11 Aug 2013 at 15:08    Image of day on 04 Oct 2013

This is a male Brown Hawker Dragonfly diving down.


Ref: 20131004_da1_20130811_1508_418_ft1 brown hawker dragonfly male in flight (crop)(r+mb id@768).jpg


Image Taken on 18 Jul 2014 at 12:36    Image of day on 24 Sep 2014

A male Brown Hawker Dragonfly flying by. We have approximately halved the overall width to give a better view of the insect


Ref: 20140924_df2_20140718_1236_165-168 brown hawker dragonfly male in flight @ 7fps 3-6 of 8 (approx halved width montage)(r+mb id@1024).jpg


Image Taken on 03 Jul 2018 at 14:35    Image of day on 22 Aug 2018

A few days later this male Brown Hawker Dragonfly is patrolling the concrete access track. It is a really good heat trap.


Ref: 20180822_d72_20180703_1435_020-026 brown hawker dragonfly male in flight @10fps 1-7 of 7 (accurate montage)(r+mb id@1024).jpg


Image Taken on 26 Jun 2011 at 12:33    Image of day on 13 Aug 2011

A Brown Hawker male viewed from underneath the insect.


Ref: 20110813_da1_20110626_1233_013+1310_156_ft1 brown hawker dragonfly male in flight bottom view with hawthorn twig (montage)(r+mb id@768).jpg


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