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Showing results 1 to 25 of 802
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Search: Posts Made By: Hauksen
Forum: Birds & Birding Monday 16th September 2019, 23:09
Replies: 98
Views: 3,976
Posted By Hauksen
Hi Mike, Since you mention courage ... maybe...

Hi Mike,



Since you mention courage ... maybe you could work up a bit of that youself and try to reply to this post?

https://www.birdforum.net/showpost.php?p=3890857&postcount=76

"Hubris" is the...
Forum: Spotting Scopes & tripod/heads Wednesday 11th September 2019, 18:24
Replies: 9
Views: 452
Posted By Hauksen
Hi John, I'd think you'd need a mechanism to...

Hi John,



I'd think you'd need a mechanism to either fold the shoulder stock against the monopod, or to disconnect the two. You could then use the shoulder stock without needing to set up the...
Forum: Spotting Scopes & tripod/heads Monday 9th September 2019, 19:21
Replies: 10
Views: 333
Posted By Hauksen
Hi Henry, Thanks a lot, quite...

Hi Henry,



Thanks a lot, quite interesting!

The forum engine allows direct links to specific posts, by the way:

https://www.birdforum.net/showthread.php?p=3535674&postcount=75
Forum: Spotting Scopes & tripod/heads Monday 9th September 2019, 18:19
Replies: 9
Views: 452
Posted By Hauksen
Hi Bob, Hm, now I wonder if it would be...

Hi Bob,



Hm, now I wonder if it would be possible to combine a monopod with a shoulder stock to improve stability.

The advantage of a regular tripod is that it creates several large triangles. A...
Forum: Birds & Birding Friday 6th September 2019, 17:30
Replies: 98
Views: 3,976
Posted By Hauksen
Hi MJB, I guess all the papers one might need...

Hi MJB,



I guess all the papers one might need for understanding that birds need to flap quicker if they want to go faster are probably already out there ;-)

Browsing in Lilienthal's "Bird Flight...
Forum: Birds & Birding Thursday 5th September 2019, 07:57
Replies: 98
Views: 3,976
Posted By Hauksen
Hi Mike, Your fallacy is trying to argue that...

Hi Mike,



Your fallacy is trying to argue that flap rates derived for characteristic speeds of species apply to an arbitrary section of flight of one observed individual.

You might want to check...
Forum: Birds & Birding Sunday 1st September 2019, 19:23
Replies: 98
Views: 3,976
Posted By Hauksen
Hi Mike, You're using the concept of standard...

Hi Mike,



You're using the concept of standard deviation outside the context where it's applicable, and that's an elementary fallacy.

Being outside 10 sigma would be an impressive probability in...
Forum: Birds & Birding Sunday 1st September 2019, 18:05
Replies: 98
Views: 3,976
Posted By Hauksen
Hi Mike, You can only draw probabilistic...

Hi Mike,



You can only draw probabilistic conclusions from the standard deviations, so even in the best of cases, you could not rule out the Pileated Woodpecker with certainty.

To draw a numeric...
Forum: Birds & Birding Sunday 1st September 2019, 16:55
Replies: 98
Views: 3,976
Posted By Hauksen
Hi Mike, It's just as elementary that the...

Hi Mike,



It's just as elementary that the standard deviation is just an indication that the deviation from the mean is unlikely to be the results of mere random fluctuations.

The observed bird...
Forum: Birds & Birding Sunday 1st September 2019, 14:26
Replies: 98
Views: 3,976
Posted By Hauksen
Hi Mike, How do you arrive at the conclusion...

Hi Mike,



How do you arrive at the conclusion that the filmed bird was in cruising flight?



It's 1 location, 11 flights, in table 7, which deals with flight speed.
Forum: Birds & Birding Sunday 1st September 2019, 10:45
Replies: 98
Views: 3,976
Posted By Hauksen
Hi Mike, Thanks a lot for the...

Hi Mike,



Thanks a lot for the link!

Tobalske's 1996 data set on the Pileated Woodpecker consisted of merely 11 observed flights on a single location, and as far as I can tell, he makes no claims...
Forum: Birds & Birding Saturday 31st August 2019, 20:49
Replies: 98
Views: 3,976
Posted By Hauksen
Hi Mike, Maybe you could provide a direct link...

Hi Mike,



Maybe you could provide a direct link to make it more accessible? I checked your page, but couldn't figure out what you might consider the key article.

Regards,

Henning
Forum: Binoculars Wednesday 28th August 2019, 23:01
Replies: 3
Views: 275
Posted By Hauksen
Hi, Yes. The reason is that you have 3 feet in...

Hi,



Yes. The reason is that you have 3 feet in a yard.

128 m/1000 m is the same as 128 yards/1000 yards, and it would be sane to leave out the unit altogether, because it doesn't matter.

If ypu...
Forum: Bird Ringing and Banding Friday 23rd August 2019, 20:28
Replies: 3
Views: 310
Posted By Hauksen
Hi H, From Fiedler, "Die Vögel Mitteleuropas...

Hi H,



From Fiedler, "Die Vögel Mitteleuropas sicher bestimmen", the wing length of Raven is >= 37.5 cm, while that of crows is < 35 cm. No values for the primaries are given, but maybe it's...
Forum: Bird Behaviour Friday 23rd August 2019, 20:01
Replies: 7
Views: 646
Posted By Hauksen
Hi Christophy, In Germany, House Sparrows, if...

Hi Christophy,



In Germany, House Sparrows, if treated friendly, can get used to humans very quickly. I've stood outside Berlin central station, and there were sparrows hovering near everyone who...
Forum: Bird Behaviour Friday 23rd August 2019, 19:46
Replies: 7
Views: 646
Posted By Hauksen
Hi Peter, There seem to be videos online of...

Hi Peter,



There seem to be videos online of parrots dancing to music, and the twirls are known from the crane's mating dance ... maybe every bird actually appreciates music and dance? I can't...
Forum: Computers, Birding Software And The Internet Friday 23rd August 2019, 19:24
Replies: 17
Views: 650
Posted By Hauksen
Hi, It is, though I have to admit that...

Hi,



It is, though I have to admit that checking out the German version, the claims about locations for similar-sounding words being widely separated don't hold true, as it took me less than 5...
Forum: Birds Of Prey Thursday 22nd August 2019, 19:38
Replies: 31
Views: 2,124
Posted By Hauksen
Hi Laurie, Yes, that's depressing ... while...

Hi Laurie,



Yes, that's depressing ... while the recovery of the Peregrine population is absolutely wonderful, it would have been even more wonderful if mankind had learned something from the...
Forum: Birds Of Prey Thursday 22nd August 2019, 16:23
Replies: 31
Views: 2,124
Posted By Hauksen
Hi Laurie, After reading the Adebar article,...

Hi Laurie,



After reading the Adebar article, it seems that the German Peregrine population was 825 pairs in the early 1950s, plummeted down to "a few" in the mid-1970s, and increased to about 70...
Forum: Birds Of Prey Thursday 22nd August 2019, 12:38
Replies: 31
Views: 2,124
Posted By Hauksen
Hi Kb57, Thanks for the numbers ... for...

Hi Kb57,



Thanks for the numbers ... for comparison, in Germany it's:

Peregrine: 1000 - 1200 pairs
Kestrel: 44000 - 74000 pairs
Common Buzzard: 80000 - 135000 pairs
Forum: Conservation Wednesday 21st August 2019, 06:45
Replies: 38
Views: 1,434
Posted By Hauksen
Hi John, That mere knowledge of a limitation...

Hi John,



That mere knowledge of a limitation does not necessarily result in an adaption of different utilization strategies of the resources in question is in fact one of the things game theory,...
Forum: Conservation Tuesday 20th August 2019, 19:27
Replies: 38
Views: 1,434
Posted By Hauksen
Hi, That sounds highly interesting. In case...

Hi,



That sounds highly interesting. In case you've read it, would you consider her book "Governing the Commons: The Evolution of Institutions for Collective Action" accessible to laypersons?

From...
Forum: Binoculars Wednesday 14th August 2019, 07:05
Replies: 104
Views: 9,996
Posted By Hauksen
Hi Chosun, Thanks a lot for the great...

Hi Chosun,



Thanks a lot for the great summary!

I'd add that if we broaden the categories slightly ...

- 8x42 category -> 7 to 8.5 x 42 category
- 8x32 category -> 8 x 30 to 32 category
Forum: Birds & Birding Wednesday 7th August 2019, 07:23
Replies: 46
Views: 1,846
Posted By Hauksen
Hi Andy, Oops ... you're right, major case of...

Hi Andy,



Oops ... you're right, major case of tunnel vision on my part! :-D

Regards,

Henning
Forum: Birds & Birding Tuesday 6th August 2019, 18:00
Replies: 46
Views: 1,846
Posted By Hauksen
Hi Andy, Just two outside at the moment, after...

Hi Andy,



Just two outside at the moment, after a couple of days absence, having a mini screaming party by themselves.

And when most of Germany experienced massive thunderstorms last Friday, I saw...
Showing results 1 to 25 of 802
 


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