Falchi pellegrini a San Francisco

[Roxy]

BREAKING NEWS (LITERALLY): The third and final egg in Jose and Clara's nest has hatched, live on camera! Jose had been in the nest, and while settling down to brood the two young, he rotated the third egg and it was clearly visibly cracked along one side. Clara relieved Jose of brooding/incubating duties just a few minutes later, and at 9:35 AM this morning, the third young falcon emerged from its egg. This is a tremendous success for a first year nesting pair, and no doubt Jose and Clara will be very busy feeding the THREE youngsters over the coming weeks!

dal sito !


ecco Clara che aiuta l'ultimo piccolo ad uscire... i piccoli sono nati a raffica... come si usa tra i falchi e per una giovane femmina al primo nido e' un grande successo

[Roxy]

noi sappiamo (dolorosamente) proprio in questi giorni come ci siano piu' posizioni in merito a san francisco la domanda e' stata posta da un membro del forum e Genn Neville cosi' risponde dando il suo contributo alla discussione.....


************************************
domanda:
-----------
...since I've been watching G$G starting in 2005, I'm hesitating...Since
viewing that single, lonely abandoned egg in the new nest, after
Gracie's
first clutch was protectively kidnapped, I am questioning whether the
significant benefits of extending so much help via human
intervention also
carry with them an inadvertent consequence of modifying or
'de-naturalizing'
Peregrine behavior. It's sort-of like they're semi-domesticated via
remote
control imaging. They're still in the wild, but their particular
"WILD" And
natural environment has a major corporation and a devoted flank of field
biologists watching their every move...I am suddenly reminded of
that Jim
Carrey movie,"The Truman Show" and for the very first time, I feel sad.
Maybe it wouldn't have been a great thing to lose the one possible
fledgling
to traffic from the Bridge, but hopefully, G&G are not learning new
behaviors in response to thwarted natural progressions...

Not that I've changed my mind wholly in that direction, of course,
but this
has given me pause, and I'm wondering if anyone else has had similar
musings.

Thanks for listening,
Laura

+++++++++++++++++++++++++++++++

risposta di Glenn Neville:
-----------------------------

Hi Laura,

While there is some parallels in G&G's situation to the movie "The
Truman Show", there is one very big difference among many and that is
the pergrines are not captive in a dome, they are free to move about
and leave as the desire moves them.

Peregrines have actually been in close relationship with humans for
thousands of years, the art of falconry dates back to prehistory.
Falcons have been birdnapped, eggs stolen, chicks stolen since before
anyone could write. Other animals and birds have preyed upon their
young, so there is nothing new going on here except that now the
interference is occuring for their benefit and aid rather than for us.

If the chick had been left on the bridge to fledge, the most likely
scenario would have been that the chick would have flown when no one
was looking and ended up in the water and drowned. And no one would
have seen it or been able to recover it in time.

Since the pair is nesting on a man-made structure that is similar
enough to their natural habitat, but different enough to cause extreme
risk to the young produced there, it seems only right that humans
have the obligation to minimize the number of deaths caused by the
artifical environment.

If the peregrine were not threatened, having only recently been taken
off the endangered species list, pulling the eggs for incubation etc,
would perhaps not be done. This would let the birds that nest on
natural cliffs in safer locations reproduce while letting the birds
attracted to man-made bridges that cause higher mortality die out
because they do not reproduce. But I hope that would not be the case,
as I mentioned up above, I believe we have the duty to try to mitigate
and minimize any deaths to the falcons caused by environmental changes
that we create, including deaths caused by window strikes, windmill
power generation deaths, power line electrocutions, as well as the
obvious need to keep the air and water clean and the environment clear
of toxic substances.

I believe this applies to all creatures and all situations, not just
to the falcons we love, but to all the creatures both great and small.
I don't think I am alone in this belief, members of Audubon, the
Sierra Club, the Nature Conservancy, the World Wildlife fund and
hundreds of other groups are lobbying every day to try to make this
world safer for animals of all kinds.

Anyway that's my two cents...

Regards,
Glenn Nevill

[Roxy]

[quote="Roxy"]noi sappiamo (dolorosamente) proprio in questi giorni come ci siano piu' posizioni in merito a san francisco la domanda e' stata posta da un membro del forum e Genn Neville cosi' risponde dando il suo contributo alla discussione.....
*****************************************************+

e brian walton aggiunge:

that is a logical conclusion after one experience at a nest. But we
have been doing these sorts of things successfully for 30 years. We
can not guarantee every falcon will act or react the same, just like
you are not exactly like your siblings or your children will not be
exactly alike. The entire experience is actually much more
significantly impacting the human viewers than it does the wild
birds. Their goal, ecologically speaking, is to keep breeding long
enough to successfully replace themselves in the population. What
happens to them each year is far more important emotionally to us
humans than it is to the wild falcons. But it is sad we could not do
better for them, but they will live to try again. Hopefully we will
get another glimpse of what they do. Brian Walton

[Roxy]

Mi e' sembrato interessante postare queste domande e risposte
sui falchi ... domanda dal forum risposta da parte di Mr. Walton


1. What is the average life span of peregrines? we suggest 5 to 10
years with real old ones being 20+

2. During that time, how long do they normall breed? stat year two
and breed as long as alive

3. Toward the end of their breeding span, do they start to lay more and
more infertile eggs or do the eggs remain "normal" the whole time?
that is not usually reported, they seem to lay good eggs as long as they breed

5. If they stop breeding during their life time, does the couple
normally stay together anyway? probsably would but I have not seen
one stop breeding

[Roxy]

eccola la piccolina dell'uovo del bay bridge qualche giorno fa.
e' ancora alimentata dai biologi e ancora col suo "fratello di latte"
il falchetto (maschio) messole a compagnia... e' questione di giorni e poi
sara' messa in un nido come foster chick (pullo adottivo)

[Roxy]

eccola la piccolina dell'uovo del bay bridge qualche giorno fa.
e' ancora alimentata dai biologi e ancora col suo "fratello di latte"
il falchetto (maschio) messole a compagnia... e' questione di giorni e poi
sara' messa in un nido come foster chick (pullo adottivo)

ecco oggi cosa si scrive dei due piccoli della foto... qualcuno chiama la falchetta Bridget... visto che e' nata dall'unico uovo fortunato del Bay bridge...

Sembra che l'altro uovo (deposto e poi abbandonato da Gracie nel nido artificiale predisposto per lei ma a quanto pare non gradito) sia fertile
lo cova Sophie un falco usato per la didattica e portato nelle scuole... Sophie e' imprintata sull'uomo pero' e la cosa per me e' un po' triste anche se loro hanno detto meraviglie di questa cosa!
ecco Sophie con il suo partner umano e con le uova tra cui quello di Gracie

[Roxy]

nel forum di San Francisco si discuteva del video che ho postato credo nel topic delle discussioni in merito al momento in cui il falco si getta in picchiata sulla preda e sembra per alcuni istanti perdere l'assetto e (non so come si dice in gergo aereonautico) sembra un po' impaalato e fuori assetto.. hanno postato questo indirizzo con una pubblicazione scientifica in merito. Ho salvato il post e non so come allegarlo o trasmetterlo. E' piu' una cosa per esperti che per me anche se l'ho stampato e ho intenzione di leggermelo..
Se interessa a Giac o Paolo o qualcun altro (magari esperto di volo) ditemi come fare ad allegarla ...
Questo e' il titolo : curved fligh paths and sideways vision in peregrine falcon (falcus peregrinus) di Vance A. Tucker, Alice E: Tucker, Kathy Akers, James H. Enderson. Pubblicatro su WWW nel Novembre del 2000

[Roxy]

nel forum di San Francisco si discuteva del video che ho postato tra le discussioni (rif. viewtopic.php?t=715) in merito al momento in cui il falco si getta in picchiata sulla preda e sembra per alcuni istanti perdere l'assetto e (non so come si dice in gergo aereonautico) sembra un po' impaalato e fuori assetto.. hanno postato questo indirizzo con una pubblicazione scientifica in merito. Ho salvato il post e non so come allegarlo o trasmetterlo. E' piu' una cosa per esperti che per me anche se l'ho stampato e ho intenzione di leggermelo..
Se interessa a Giac o Paolo o qualcun altro (magari esperto di volo) ditemi come fare ad allegarla ...
Questo e' il titolo : curved fligh paths and sideways vision in peregrine falcon (falcus peregrinus) di Vance A. Tucker, Alice E: Tucker, Kathy Akers, James H. Enderson. Pubblicatro su WWW nel Novembre del 2000

corretto l'indirizzo del video nel topic discussioni:

http://www.youtube.com/watch?v=Z7MeIeqJYXc

[Giovanna]

Non riesco a trovare il video che dici, Roxy, molte aquile, ma nessun falco.. Possibile che abbiano scritto 'falcus' e non Falco peregrinus :?:
L'imprinting per me personalmente è un problema etico non da poco, perché crea dipendenza praticamente completa nell'animale che rimane allo stadio infantile e vede nel suo umano un genitore a cui chiedere perennemente cibo anche se non ne ha bisogno (un 'begging' continuo e senza tregua). L'ho visto con i miei occhi e soprattutto sentito con le mie orecchie. Se avessi percorso quella strada, di avere (o essere posseduta da) un falco, avrei preferito la difficile conquista della sua fiducia, se ne fossi stata capace. Ma tanto era solo un sogno inattuabile.. :D

[Roxy]

Non riesco a trovare il video che dici, Roxy, molte aquile, ma nessun falco.. Possibile che abbiano scritto 'falcus' e non Falco peregrinus :?:
L'imprinting per me personalmente è un problema etico non da poco, perché crea dipendenza praticamente completa nell'animale che rimane allo stadio infantile e vede nel suo umano un genitore a cui chiedere perennemente cibo anche se non ne ha bisogno (un 'begging' continuo e senza tregua). L'ho visto con i miei occhi e soprattutto sentito con le mie orecchie. Se avessi percorso quella strada, di avere (o essere posseduta da) un falco, avrei preferito la difficile conquista della sua fiducia, se ne fossi stata capace. Ma tanto era solo un sogno inattuabile.. :D

ciao Gio' avevo copiato l'indirizzo sbagliato! sopra ho corretto il mio messaggio sia nell'area discussioni che qui sopra indicando URL giusto... (perlomeno a me cosi' si apre) . Comunque il video ha il titolo PERE KILL su youtube lo consiglio a tutti e' fatto bene, una cosa professionale... nel forum dicono che la voce e' di Attenborough (non mi ticordo piu' se e' corretto cosi' il nome) che e' il documentarista della BBC ....

[Giovanna]

Bello:!: :!: :!: :D :D :D
Ciao, Ro, grazie! Potrebbe benissimo essere di un documentarista della BBC

[Roxy]

non e' niente di che ma ho trovato questo racconto cosi' vivo e palpitante.. non saprei renderlo in italiano altrettanto bene... ma nonostante i 2 di San Francisco G & G non abbiano covato in vista... i loro fan li seguono e li amano appassionatamente... che bello non e'?
=======================================

Thanks Janet, G&G sure owned the territory tonight. Ann saw a brief part of a spectacular
flying exhibition complete with soaring, long distance flying and flapping, partner hunting,
and the grand finale, a food exchange.
I met up with Cheryl and Glenn N on the Embarcadero at the bow and arrow sculpture at
5:30. I found Gracie on the horizontal beam right under the roadbed, 4 holes out from W4.
It's very hard to see her there, I needed my scope to spot her. It was fairly quiet until about
6, George showed up on the walkway of W4, and they both perched and preened. Glenn
had to leave and as it turns out, he was the sacrifice. It often seems when one person
leaves a group watching the birds, something happens, and it did.
About 5-10 min. after he left, G&G took off flying together. They soared and circled out
over the towers east of W4 (W5&W6). We saw them stoop together on the south side of W5,
then they seperated. Cheryl and I decided to each take a bird to follow and for the next
15- 20 minutes we watched as they came together, then flew apart. Here's a sample of our
on-going dialogue with each other: " Mine's going right, turning this way", "Mine's on top,
heading left", Mine's coming into town", Mine's soaring up high", "Come on George and
Gracie come to town", and on and on. We were able to tell that Cheryl was following Gracie
and I was on George. George did come to town, circled around the Steuart tower a few
times then headed back to sea to meet up with Gracie. They soared, glided, flapped, and
stooped again before they landed back on W4's walkway. With sore necks and arms, we
were pleased they took a break. We thought that was all, but when Cheryl invoked her 5
min rule, Gracie flew off the railing and began soaring around the bridge. She landed on
the cables just east of W3 and Cheryl said good-bye, heading home for her own dinner.
Well, she was the second sacrifice of the night, I was determined to get a close up of
Gracie so I stayed. 5-15 minutes after she left, George joined Gracie on the bridge, and
soon they took off together and immediately were in a hunt together. This time they
headed west, toward me, both stooping on a bird, up above the bridge, diving down below
the bridge, heading to land over the Fire Station at pier 22, low. They both missed the bird
more than once, the little guy was literally flying for its life and made a few great
manuevers to stay out of G&G's talons. I've never been so close to both birds hunting
together at such a low level, and I haven't been so pleased with such a show all season! I
was beside myself trying to figure out who to follow when they separated, but decided to
stay with Gracie. It was easy to tell who was who, they are right over my head and I saw the
missing feather in the tail. She gave up the hunt, don't know where George and the prey
went (missing my partner, Cheryl). She slowly circled right over me, several times, low, as
if to say "hello, I'm here, I'm ok." It was moving. She flew back out to the bridge and landed
close enough for me to get a good look at her through the scope. I looked and looked at
the right side of her head, but her white spot is gone. I've been driven to get a close
enough view of her to see that white spot. Well, I did get a close enough look and the
white spot is gone. But you know what? I still think it is Gracie. She didn't have a white spot
in 2005, so she may have lost that feather in this years molt. Who knows, I don't. But I do
know this was a big falcon circling over my head, rosy breast, and I think I saw a silver
band on the right leg.
As if all this isn't enough, she flies after 5 min on this perch close to me, goes east almost
to Treasure Island, turns north, flapping all the way. As I'm following her George comes
into sight flapping from the west heading towards her. They meet, George above her, and
he drops prey to her. She initially misses it, but scoops down and picks it up before it gets
away. A food transfer!! I am really counting my blessings now. This is the ultimate icing on
the cake. They fly together back toward the bridge, and I figure they are going to W4. Oh
no....don't let Kanit figure anything out, ok? Instead they head for W3, George lands on
the cable and Gracie lands on the east side of the tower out of sight.
So....George finished that hunt and got the prey, the third hunt we saw tonight. He brings
it back and gives it to Gracie, lets her eat and waits, perched on the bridge. This is the
George we all know and love. He has always been the premier provider.
And Gracie remains the Empress, ever willing to help, flying by his side.
That is where I left them, needing to return to my own territory for dinner.

To all G&G fans, don't be too sad that they aren't in the canyon, because they're still
around. A little farther away, and it may take longer to get a good look, but they are here
in the neighborhood, just east of the concrete canyon. With patience you'll be blessed with
their presence.

Filled with gratitude for the wild in the city, esp. our G&G.
Kanit

[Roxy]

nonostante la stranissima stagione dei due di San Francisco, proprio nella settimana trascorsa due avvenimenti :

1) la piccola nata dal "salvataggio" delle uova di George and Gracie sul Bay Bridge e' stata liberata su uno spazio apposito nel centro di Santa Cruz insime al maschio dei pulli dell'altra coppia di S.Francisco che aveva nidificato sol lato est del ponte.. a loro viene rilasciato cibo regolarmente e sono sorvegliati in modo da recuperarli se nei primi voli si cacceranno nei pasticci, sono anche dotati di un piccolo trasmettitore fissato al piede che nel giro di qualche settimana si sgancera', proprio per tenerli sotto controllo. La femmina dell'est del ponte non e' ancora pronta per il rilascio... Ecco alcune foto di Mary Malec , Bridget e' in primo piano, nella prima e' seminascosta, e si vede bene in compagno d'avventura...
nella seconda lei riempie la scena... sono due bei ragazzi... e lei ha gia' la stazza materna....



2) intanto e' nato il pullo dell'uovo del secondo nido di G&G quello che era stato abbandonato.. potete vederne le tenerissime foto a questo indirizzo

http://www2.ucsc.edu/scpbrg/sfgallery.htm

[Sonia]

Grazie Roxy!!!
Avevo letto qualcosa sul forum di Buffalo, ma non tutti questi particolari...
E le foto?
Sono bellissime.
E' bello percepire l'amore che hanno intorno!
:D

[Roxy]

Grazie Roxy!!!
Avevo letto qualcosa sul forum di Buffalo, ma non tutti questi particolari...
E le foto?
Sono bellissime.
E' bello percepire l'amore che hanno intorno!
:D

Si ad essere sincera mi identifico molto con gli aficionados di questi falchi, diversi sono altrettanto apprensivi di me!!! Si emozionano e fanno un sacco di domande anche tecniche. Poi c'e' uno zoccolo duro dei falconatics o anche canyoneers che sono quelli che regolarmente, quasi ogni giorno scarpinano ad ora pasti o dopo il lavoro tra i moli o nei "canyon" cittadini cercando di scoprire dove sono e cosa fanno i loro falchi...
Il loro centro di riferimento a Santa Cruz quest'anno ha effettuato il recupero delle uova di G&G, dei pulli dell'east span in eta' di banding e si e' preso cura dell'uovo abbandonato. Ma proprio all'inizio del periodo di nidificazione della coppia "regina" avevano rilasciato dallo stesso luogo dove ora e' stata liberata Bridget 3 falchetti nati in cattivita'..