And closing with the renewal of the bond between the Oberhausen couple.
We wish the 3 juvies a long and proper life: fly free...soar high
Be good and until next season in 2009!
Monday, June 2, 2008
Oberhausen: end of the season
And closing with the renewal of the bond between the Oberhausen couple.
We wish the 3 juvies a long and proper life: fly free...soar high
Be good and until next season in 2009!
Avian Muscle System
Avian Muscle System
A bird has some 175 different muscles controlling the movements of its wings, legs, feet, tongue, eyes, ears, neck, lungs, sound-producing organs, body wall and skin. Collectively, the muscles are concentrated near the bird's center of gravity.
Largest of all the muscles are the breast muscles, or pectorals. These muscles form the bulk of the fleshy mass in the breast and constitute about 15 to 20 percent of the bird's total body weight. They also provide the powerful downstroke of the wing and therefore bear most of the burden of supporting a bird in flight.
The supracoracoideus -- the muscle that raises the wing -- acts as the antagonist to the pectorals. This muscle is located below the pectoral muscles ventrally (on the front side). Together, these two muscles constitute about 25 to 35 percent of a bird's body weight. Besides the supracoracoideus there are numerous other small muscles of the wing that allow a bird to control flight.
Other muscles that play a critical role in flight are the skin muscles. The involuntary skin muscles, for example, which are attached to almost every feather follicle, can raise, lower, or move feathers sideways to assist a bird in its flight maneuvers.
The trunk and tail muscles are few, but extremely mobile and complex. One of these muscles, the pygostyle, supports the tail feathers and controls their entire range of movement.
"The thin, stringy muscles of the vertebral column control the elaborate lateral and ventral movements of the head and neck. Some of these muscles extend only from one vertebra to the next, and others link the movements of long series of vertebrae.
A bird has some 175 different muscles controlling the movements of its wings, legs, feet, tongue, eyes, ears, neck, lungs, sound-producing organs, body wall and skin. Collectively, the muscles are concentrated near the bird's center of gravity.
Largest of all the muscles are the breast muscles, or pectorals. These muscles form the bulk of the fleshy mass in the breast and constitute about 15 to 20 percent of the bird's total body weight. They also provide the powerful downstroke of the wing and therefore bear most of the burden of supporting a bird in flight.
The supracoracoideus -- the muscle that raises the wing -- acts as the antagonist to the pectorals. This muscle is located below the pectoral muscles ventrally (on the front side). Together, these two muscles constitute about 25 to 35 percent of a bird's body weight. Besides the supracoracoideus there are numerous other small muscles of the wing that allow a bird to control flight.
Other muscles that play a critical role in flight are the skin muscles. The involuntary skin muscles, for example, which are attached to almost every feather follicle, can raise, lower, or move feathers sideways to assist a bird in its flight maneuvers.
The trunk and tail muscles are few, but extremely mobile and complex. One of these muscles, the pygostyle, supports the tail feathers and controls their entire range of movement.
"The thin, stringy muscles of the vertebral column control the elaborate lateral and ventral movements of the head and neck. Some of these muscles extend only from one vertebra to the next, and others link the movements of long series of vertebrae.
Brighton Sussex Heights
The eyases don't show themselves anymore in front of the webcam, they are out on the ledge hop-flapping and exercising their flightmuscles.It won't be long now before the first one will fledge
Sunday, June 1, 2008
Terminal Tower Cleveland: getting ready to fledge
Tiger
Thriller
Tiki
Spirit
Spirit and Tiger
Once again amazing photo's of Chris and Chad Saladin! Thabk you both so much for making these special and wonderful awesome pictures of the Terminal Tower peregrines.
All pictures are courtesy Chad and Chris Saladin ©
De Mortel: what a day!!!
What a great day this has been. Early this morning 2 of our juveniles left the roof of the tower and flew to the first ring. The eldest managed to get back up to the ledge. The other one did not.
S2 broight in a fresh pigeon in the morning and plucked it on the 4th ring, had a lot of trouble bringing it up to the nestbox and landed with the heavy prey on the first ring to feed the left behind fledeling. After that she flew up to th eroof to the 2 juvi's over there and finally brought a piece to the female in the nestbox. Who is still not out.
A second fresh pigeon was brought up at 4 and was dropped in front of the cam! And this brought a lot of entertainment. Juvi's plucking, eating, pa who plucked and fed the juvi's, it took hours before the pigeon was completely eaten.
Both for the people on teh spottersplace and for everybody at home it was a day full of enjoyment.
As the night fell, 3 juvi's are sleeping in the nestbox, the fourth is on the first ring,, I'm sure S2 is keeping an eye on him.
More than 300 pictures of today : http://picasaweb.google.nl/efrona22/DeMortel1Juni
Derby Cathedral Peregrine Project
The 4 cuties are getting more beautiful every day. They are changing very rapidly now into brown juvi's in fact the eldest one is transforming so quickly one can even see a difference between early morning and late evening. The youngest one is a bit behind, but will catch ip no doubt. They are very well provided with food by both parents. It is a joy to watch this nestsite and the wonderful webcamimages!
Thank you Derby Project Members!
http://derbyperegrines.blogspot.com/
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