<< Previous Next >>


Photo Information
Copyright: Lawhill Russo (lawhill) Gold Star Critiquer/Gold Note Writer [C: 317 W: 2 N: 565] (2054)
Genre: Animals
Medium: Color
Date Taken: 2007-06-09
Categories: Birds
Camera: Nikon D-200, Sigma 150mm F2.8 APO Macro DG HSM
Exposure: f/7.1, 1/250 seconds
More Photo Info: [view]
Photo Version: Original Version
Date Submitted: 2007-06-16 21:13
Viewed: 2812
Points: 44
[Note Guidelines] Photographer's Note
Amazilia emerald hummingbird

Hummingbird flight has been studied intensively from an aerodynamic perspective: Hovering hummingbirds may be filmed using high-speed video cameras.
Writing in Nature, biomechanist Douglas Warrick and coworkers studied the Rufous Hummingbird, Selasphorus rufus, in a wind tunnel using particle image velocimetry techniques and investigated the lift generated on the bird's upstroke and downstroke.
They concluded that their subjects produced 75% of their weight support during the down-stroke and 25% during the up-stroke: many earlier studies had assumed (implicitly or explicitly) that lift was generated equally during the two phases of the wingbeat cycle, as is the case of insects of a similar size. This finding shows that hummingbirds' hovering is similar to, but distinct from, that of hovering insects such as the hawk moths.

Ken52, jaycee, gracious, SelenE, Matt-Bird, jmirah, haraprasan, parthasarathi, fartash, eqshannon, SkyF, dew77 has marked this note useful
Only registered TrekNature members may rate photo notes.
Add Critique [Critiquing Guidelines] 
Only registered TrekNature members may write critiques.
ThreadThread Starter Messages Updated
To eqshannon: Hi Boblawhill 1 06-17 13:18
You must be logged in to start a discussion.

Critiques [Translate]

  • Great 
  • Ken52 Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 636 W: 93 N: 1243] (4195)
  • [2007-06-16 21:18]

Hello Lawhill,
It is the season for hummingbirds, but this is a most colorful one! Great focus and excellent detail. Brilliant and vivid colors. Nice glint of light in eye. Outstanding pose by your subject. Perfect DOF and blurred background. Nicely framed.

hi lawhill,
very nice shot, lovely colours, so colourful humming bird captured in a nice pose, liked the composition,
tfs & regards

  • Great 
  • arfer Gold Star Critiquer [C: 2731 W: 0 N: 0] (0)
  • [2007-06-16 23:17]

Hello Lawhill

A wonderful shot of this hummer.We do not get that species up here so it makes it extra special for me to see.The focus and details are excellent,and the colours are well saturated.Nicely composed in the frame.I like the pose with the head slightly tilted up.TFS


  • Great 
  • jaycee Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 2454 W: 10 N: 8044] (25460)
  • [2007-06-16 23:22]

Hi Lawhill,

I have never seen such a colorful hummingbird. Beautiful colors, wonderful pose and fine details. A lovely composition on the diagonal branch with the interesting background.


so wonderful shot this bird

Hello Lawhill,
Good POV with rich colour, clarity and details
very useful note

  • Great 
  • SelenE Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 2249 W: 65 N: 4205] (13972)
  • [2007-06-17 4:20]

Hi Lawhill,
This is a very nice capture of this hummingbird with very good POV, composition and details. It has amazing colors. TFS

Hi Lawhill,
What a bright coloured image, well displayed and good lighting. nice shot.

WOW Lawhill!!!...A remarkable photo...Excellent EVERYTHING!!! Very very well done!!! TFS

hi Lawhill,
A beautiful humming bird. Nicely shot and framed. BG is good and focus is spot on. Thanks a lot for sharing.

Very nice shot.Its dificult to get such sharpness in picture of these birds.

Wonderful colors! Great pose...you got him being still. :)
Lovely lovely photo!

Hello Lawhill
What a great shot of this Hummingbird,
Perfect focusing,use of flash and BG,
Fantastic colors, Superb shot,friend.

Good Luck

I am a day late and a dollar short...no correct that, just a day late. Actually as I had said in prior, I have fathers day money in order to attract these birds. My hopes are to get as good a shot as you and a few others who are so lucky to be good at their craft.

Bob Pacific NW Wilderness

Hello Lawhill,
I think that I have never seen this specie before. Its colors are amazing, what a beauty! This is an excellent capture with superb details, POV and pose from the bird!

  • Great 
  • ridvan Gold Star Critiquer/Gold Note Writer [C: 498 W: 0 N: 1136] (5205)
  • [2007-06-17 15:53]

selam lawhill ; what a colorful and cute bird , excellent shot, good details presented , very nice BG and POV, well captured with splendid colours

Not only is this great information, but the complete scene is outstanding. I like the branch angling to both corners, and your DOF. You have brought out the colours in an extreme way to show how nice these little ones are.
Classy shot!

Hello Lawhill , excellent colors and comp. very sharp photo , TFS.

  • Great 
  • SkyF Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 2234 W: 188 N: 1912] (8073)
  • [2007-06-18 9:02]

Hi Lawhill,
I see those hummingbirds are every where ... except in my garden.
Beautiful shot,
very colorful and the details are lovely.
Very nice diagonal composition with excellent placing of the subject.

  • Great 
  • dew77 Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 4432 W: 248 N: 4028] (13270)
  • [2007-06-18 12:04]

Hello Lawhill,
Beautiful capture.I liked POV,vivid colors,lurred BG,pose of bird and catchlight in eyes a lot.

  • Great 
  • Mana Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 1772 W: 36 N: 5597] (18598)
  • [2007-06-18 12:09]

Hi Lawhill,
Outstanding portrait shot of this hummingbird. Lovely colour tones and sharp details. Perfect light management and fine focus. Excellent POV and DOF. The diagonal composition looks superb. Kudos.

  • Great 
  • demeve Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 586 W: 12 N: 1682] (6165)
  • [2007-06-18 12:39]

Hello Lawhill, great picture of this hummer that I have never heard of, excellent portrait, he is so beautiful. Great POV and composition. Very sharp and detailed capture, congratulations in a fine picture.

Calibration Check