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Oenanthe oenanthe
Northern Wheatear
Steinschmätzer
Stenpikker
Now and then I will drop in a few pictures of the Northern Wheatear, the bird I owe so very much. From 2005 to 2014 it took me to several interesting places in the north of Europe and America.
It is a very special bird, not only to me but also in general:
Though a rather small bird, it has one of the largest ranges of any songbird, breeding from the eastern Canadian Arctic across Greenland, Europe, Asia and into Alaska.
All these populations are wintering in Africa!
Alaskan birds are travelling approximately 15.000 km each way, what makes them World Champions in migration among songbirds.
rsbl.royalsocietypublishing.org/content/early/2012/02/13/...
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If you like my pictures please have a look at:
Wenn Ihnen meine Bilder gefallen, besuchen Sie bitte meine Homepage
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PLEASE, NO AWARDS, no Copy and Paste Comments and no group icons like "your wonderful photo was seen in group xyz". They will all be deleted sooner or later.
BITTE KEINE AWARDS, kopierte Kommentare oder diese Gruppen-Icons wie "Ich habe Dein wunderbares Bild in Gruppe xyz gesehen". Die lösche ich früher oder später.
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This image accompanies this news story written by GrrlScientist and published on The Guardian.
This is a closer look at this data image [doi:10.1098/rsbl.2013.1067]
ftp://ftp.fao.org/docrep/fao/009/w7192e/w7192e31.pdf
adsabs.harvard.edu/abs/1989RSPSB.237..201H
www.mesa.edu.au/friends/seashores/o_truncatus.html
"While the chelae of parthenopids and eriphioids (and Dairoides) are all heterochelous, they look very different in form, with those of eriphioids especially distinctive. The large chela of some eriphiiods is specially adapted for peeling gastropods (like in calappids, see Ng & L. W. H. Tan, 1984a, 1985), with the smaller chela acting like a pair of forceps to extract the flesh of the broken mollusc. They can do this to varying degrees, with some species of Ozius even changing from peeling to crushing as they grow in size (P. K. L. Ng, unpublished data), and all clearly use their chelae differently – one for crushing or peeling the molluscs, and the other to pull out the meat within. It seems this feeding method is common to all eriphioids and Dairoides."
books.google.com.sg/books?id=CLnikFfNtDUC&pg=PT196&am...
rsbl.royalsocietypublishing.org/content/4/3/290
science.oregonstate.edu/~yamadas/SylviaCV/BehrensYamada_B...
Ariel Rodriguez, Dennis Poth, Stefan Schulz, & Miguel Vences (2010). Discovery of skin alkaloids in a miniaturized eleutherodactylid frog from Cuba. Biology Letters, 6 DOI: 10.1098/rspb.2010.1896
Ariel Rodriguez, Dennis Poth, Stefan Schulz, & Miguel Vences (2010). Discovery of skin alkaloids in a miniaturized eleutherodactylid frog from Cuba. Biology Letters, 6 DOI: 10.1098/rspb.2010.1896
The Red-backed Shrike inhabits low thorny scrub with small and medium sized trees in semi-open landscapes, often near water. It's name derives from this species impaling its prey on thorns or barbed-wire spikes to keep them in its 'larder'.
People used to mistakenly believe that it always impaled nine insects before eating one! Hence in Europe, the Germanic name Neuntöter (Nine killer) is used. Butcher bird is also a common name.
Red-backed Shrikes and other shrike species have evolved with exceptional eyesight and are considered by some as 'mini' raptors. They also have sharp talons for holding their prey.
*Ornithologists have long known that shrikes impale their prey, no one knew for certain how these songbirds managed to catch and kill relatively large vertebrates. A new analysis of high-speed video footage in the US with Loggerhead Shrikes finally reveals the answer: They grasp mice by the neck with their pointed beak, pinch the spinal cord to induce paralysis, and then vigorously shake their prey with enough force to break its neck.
*https://royalsocietypublishing.org/doi/full/10.1098/rsbl.2018.0321
The adult male has pale grey crown, nape, rump and uppertail-coverts, and chestnut mantle, back and scapulars. The upperwing is blackish with chestnut-edged feathers. There is sometimes a small, white wing patch at primaries’ bases.
The tail is black but the central pair of rectrices has white base, whereas the outer pairs show white outer webs. The black terminal bands on other tail feathers form an inverted T visible in flight.
On the underparts, chin and throat are white. Rest of underparts is pale salmon-pink. The undertail-coverts are white.
Plant species are not the only thing suffering from climate change. A Costa's Hummingbird is common in the Arizona and California deserts. It migrates in the spring to avoid the hot desert temperatures. Because of their small body, they dehydrate faster and are more vulnerable to heat. As global (including desert) temperatures rises, more desert birds are predicted to die off during the hotter times in the year.
rsbl.royalsocietypublishing.org/content/early/2009/09/25/...
Art in Nature!
Looking at the shape of the bare branches of the lovely male shrike, I saw an Angel Fish...
It made a satisfying composition.
The Red-backed Shrike inhabits low thorny scrub with small and medium sized trees in semi-open landscapes, often near water. It's name derives from this species impaling its prey on thorns or barbed-wire spikes to keep them in its 'larder'.
People used to mistakenly believe that it always impaled nine insects before eating one! Hence in Europe, the Germanic name Neuntöter (Nine killer) is used. Butcher bird is also a common name.
Red-backed Shrikes and other shrike species have evolved with exceptional eyesight and are considered by some as 'mini' raptors. They also have sharp talons for holding their prey.
*Ornithologists have long known that shrikes impale their prey, no one knew for certain how these songbirds managed to catch and kill relatively large vertebrates. A new analysis of high-speed video footage in the US with Loggerhead Shrikes finally reveals the answer: They grasp mice by the neck with their pointed beak, pinch the spinal cord to induce paralysis, and then vigorously shake their prey with enough force to break its neck.
*https://royalsocietypublishing.org/doi/full/10.1098/rsbl.2018.0321
The adult male has pale grey crown, nape, rump and uppertail-coverts, and chestnut mantle, back and scapulars. The upperwing is blackish with chestnut-edged feathers. There is sometimes a small, white wing patch at primaries’ bases.
The tail is black but the central pair of rectrices has white base, whereas the outer pairs show white outer webs. The black terminal bands on other tail feathers form an inverted T visible in flight.
On the underparts, chin and throat are white. Rest of underparts is pale salmon-pink. The undertail-coverts are white.
www.newscientist.com/article/dn3876-spider-sex-causes-spo...
www.livescience.com/19907-sexually-cannibalistic-mate-cho...
rsbl.royalsocietypublishing.org/content/6/5/585.full
www.plosone.org/article/info%253Adoi%252F10.1371%252Fjour...
www.researchgate.net/publication/228375281_Broken_genital...
rspb.royalsocietypublishing.org/content/270/Suppl_2/S183....
This image accompanies this news story written by GrrlScientist and published on The Guardian.
Spotted wren-babbler, Elachura formosa (previously Spelaeornis formosus).
Image: Per Alström/SLU [doi:10.1098/rsbl.2013.1067].
This image accompanies this news story written by GrrlScientist and published on The Guardian.
A spotted wren-babbler, Elachura formosa (previously Spelaeornis formosus) sings its distinctive song.
Image courtesy of Ramki Sreenivasan/Conservation India [doi:10.1098/rsbl.2013.1067]
A wet day but a beautiful bird to watch and photograph.
The Red-backed Shrike inhabits low thorny scrub with small and medium sized trees in semi-open landscapes, often near water. It's name derives from this species impaling its prey on thorns or barbed-wire spikes to keep them in its 'larder'.
People used to mistakenly believe that it always impaled nine insects before eating one! Hence in Europe, the Germanic name Neuntöter (Nine killer) is used. Butcher bird is also a common name.
Red-backed Shrikes and other shrike species have evolved with exceptional eyesight and are considered by some as 'mini' raptors. They also have sharp talons for holding their prey.
*Ornithologists have long known that shrikes impale their prey, no one knew for certain how these songbirds managed to catch and kill relatively large vertebrates. A new analysis of high-speed video footage in the US with Loggerhead Shrikes finally reveals the answer: They grasp mice by the neck with their pointed beak, pinch the spinal cord to induce paralysis, and then vigorously shake their prey with enough force to break its neck.
*https://royalsocietypublishing.org/doi/full/10.1098/rsbl.2018.0321
The adult male has pale grey crown, nape, rump and uppertail-coverts, and chestnut mantle, back and scapulars. The upperwing is blackish with chestnut-edged feathers. There is sometimes a small, white wing patch at primaries’ bases.
The tail is black but the central pair of rectrices has white base, whereas the outer pairs show white outer webs. The black terminal bands on other tail feathers form an inverted T visible in flight.
On the underparts, chin and throat are white. Rest of underparts is pale salmon-pink. The undertail-coverts are white.
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One of the critical parts of courtship for nursery web spiders is the nuptial gift. The male captures a fly or other insect and wraps it in his silk, which he then presents to the female as a means of initiating copulation. The female has the option of accepting the offer or rejecting it. Prior research has shown that if the male is rejected, he will typically rewrap the gift and present it again—and quite often find it accepted on the second try. If the gift is accepted, the female tears it open and begins eating the food inside while the male initiates mating.
Noting that female nursery web spiders have poor eyesight, researchers wondered if something besides appearance might be making a rewrapped package more attractive. To find out they obtained several nuptial gifts made by male spiders and then presented them to females under varied conditions. In 2021 they published their findings that the male enhances the nuptial gift when rewrapping with a pheromonal excretion.
Michelle Beyer et al, Silk-borne chemicals of spider nuptial gifts elicit female gift acceptance, Biology Letters (2021). DOI: 10.1098/rsbl.2021.0386
I, Prithviraj Kothari would like to express my heartiest thanks to you, for sending me your wishes and beautiful flowers on 13th March 2012.
It gives me immense pleasure in seeing that with grace of god, my family, all good friends and colleagues, I have managed to reach to a level which I have dreamt of. Receiving this award from Hon President of India,Smt. Pratibhadevi Patil, is a great pride in itself.
I still wish and want to do good for the whole Jain Fraternity and take it to much higher peak of success in the years to come.I believe in determination and dreaming big each time.
Again thanking you for the best wishes and continued support you have rendered.
This image accompanies this science news story.
Image: Bob O'Hara. The data for this image came from this paper: Loehr J. & O'Hara R.B. (2013). Facial morphology predicts male fitness and rank but not survival in Second World War Finnish soldiers, Biology Letters doi:10.1098/rsbl.2013.0049
This image accompanies this science news story.
Loehr J. & O'Hara R.B. (2013). Facial morphology predicts male fitness and rank but not survival in Second World War Finnish soldiers, Biology Letters doi:10.1098/rsbl.2013.0049
This image accompanies this science news story.
Image: Bob O'Hara. The data for this image came from this paper: Loehr J. & O'Hara R.B. (2013). Facial morphology predicts male fitness and rank but not survival in Second World War Finnish soldiers, Biology Letters doi:10.1098/rsbl.2013.0049
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Bower, M., Campana, M., Whitten, M., Edwards, C., Jones, H., Barrett, E., Cassidy, R., Nisbet, R., Hill, E., Howe, C., & Binns, M. (2010). The cosmopolitan maternal heritage of the Thoroughbred racehorse breed shows a significant contribution from British and Irish native mares Biology Letters DOI: 10.1098/rsbl.2010.0800
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Bower, M., Campana, M., Whitten, M., Edwards, C., Jones, H., Barrett, E., Cassidy, R., Nisbet, R., Hill, E., Howe, C., & Binns, M. (2010). The cosmopolitan maternal heritage of the Thoroughbred racehorse breed shows a significant contribution from British and Irish native mares Biology Letters DOI: 10.1098/rsbl.2010.0800
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This image accompanies this news story.
Figure 1. (a–c) Box plots of the per cent total trial time that black males (n = 12) in each eye condition closely viewed social stimuli from adjacent choice zones. Horizontal dashed line denotes overall mean. (a) Black female, (b) red female and (c) black male. [doi:10.1098/rsbl.2012.0830]