J_Star
81 posts
Nov 17, 2004
12:39 PM
|
In May, there was a poll about "Eye Color Related To RollDowns?". My question is, how about the size of the roller? While there is some evidence that large rollers (Skeletal size) affect performance, there is also a belief that they may develop more momentum in the roll than they can recover from, and hence are more likely to rolldown.
Can anybody elaborate on this with their experence and observations?
Thanks
Jay
|
Birdman
25 posts
Nov 17, 2004
1:10 PM
|
I don't think that a bird being large or small will make it more or less prone to roll down. I think that certain other factors can make a bird prone to erratic rolling at times but a true rolldown is mentally programmed to be that way regardless of its size.. Just my opinion.
Russ
|
K.Naylor
64 posts
Nov 18, 2004
11:41 AM
|
jay, i do not believe that "eye color" has anything to do with it and I do not think size does either. I think pupil position and size does play a part in the rolldowns.
|
J_Star
82 posts
Nov 19, 2004
4:44 AM
|
Keven,
Would you elaborate further on the pupil position and the size of a roll down please. Thanks
Jay
|
rollerpigeon
Site Moderator
181 posts
Nov 20, 2004
7:14 AM
|
Jay, any eye colored bird can roll down. If the poll is accurate, across familys, the pearl eyes seem to be what is noted for rolling down most. I think it is interesting at best. One should not get rid of their pearl eyed birds as a result of the poll.
I think that size can be a factor, but also so is rolling depth and lack of control, when the bird wants to stop rolling, momentum due to size probably keeps it in a downward direction longer than one that can snap out of it in an instant. Feathers wide enough and stiff enough to act as an air brake come into play as well.
Mental abilities are important too. Probably the most important IMO.
I think a bird can roll down for a multiple of reasons but I think the main factor is lack of control and awareness of its relationship of distance to the ground and its own awareness of being able to stop in time.
I have rollers that roll to a nice depth but never do (knock on wood lol) when coming in to land. They have short bursts or do a few flips, but they seem to be aware that a deeper roll would harm themselves.
FLY ON! Tony Chavarria
|
rollerpigeon
Site Moderator
183 posts
Nov 21, 2004
9:16 PM
|
Hey Jay, I think a bird that is "balanced" would tend to roll correctly (like a ball, regardless of size). The next question for me would be does it have control? In other words, does he stop the roll when he wants to? If he does have the mental will to stop the roll, does he have the physical tools to go along with it?
What I mean by that does the feather width tend to be wide as opposed to narrow? Are the feather tips shaped more "square" than rounded? Is the strenght of the quill of the secondary feathers sufficient to not flex or bend that there is less drag and so stopping the roll is physically more challenging? Is the webbing of the vane firm enough to offer sufficient air resistance?
After someone answers the wieght and momentum questions, these physical tool questions need to be asked next.
FLY ON! Tony Chavarria
Last Edited by rollerpigeon on Nov 21, 2004 9:18 PM
|
