Ornithology B/C

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hexagonaria
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Re: Ornithology B/C

Postby hexagonaria » March 14th, 2011, 4:45 pm

I don't remember the phainopepla on last years list
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Re: Ornithology B/C

Postby FueL » March 14th, 2011, 4:59 pm

It was on there, if you're not sure they still have the 2010 list up too.
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Re: Ornithology B/C

Postby XXGeneration » March 14th, 2011, 5:29 pm

Is there any way for you to be able to tell if a bird is altricial or precocial based on physical characteristics?

For example, on one of our practice tests it asked if an American Woodcock was precocial or altricial. It then asked us for 2 characteristics of this bird that showed that it was whichever type it was.

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Re: Ornithology B/C

Postby mingtian » March 14th, 2011, 5:34 pm

Altricial means they're incapable of moving by themselves after birth. They have to be nourished by their parents.Altricial birds are featherless- they don't have any down feathers. Sometimes, they eyes of an altricial bird are closed. Precocial birds are just the opposite, they are born with down and have open eyes.

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Re: Ornithology B/C

Postby kjhsscioly » March 14th, 2011, 6:08 pm

Is there any way for you to be able to tell if a bird is altricial or precocial based on physical characteristics?

For example, on one of our practice tests it asked if an American Woodcock was precocial or altricial. It then asked us for 2 characteristics of this bird that showed that it was whichever type it was.

It has quite a bit to do with environmental characteristics, for example, whether pairs mate for life or not. Those that tend to provide more care are usually altricial, because the baby is born with an underdeveloped brain. There is a great section on it here: http://www.stanford.edu/group/stanfordb ... icial.html

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Re: Ornithology B/C

Postby Teal » March 14th, 2011, 9:18 pm

Already prepping for the WA state tournament! I'm studying from the Encyclopedia of North American birds.
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Re: Ornithology B/C

Postby kjhsscioly » March 14th, 2011, 11:46 pm

Is that the DK encyclopedia, or is there another one?

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Re: Ornithology B/C

Postby aubrey048 » March 15th, 2011, 9:20 am

Is there any way for you to be able to tell if a bird is altricial or precocial based on physical characteristics?

For example, on one of our practice tests it asked if an American Woodcock was precocial or altricial. It then asked us for 2 characteristics of this bird that showed that it was whichever type it was.

It has quite a bit to do with environmental characteristics, for example, whether pairs mate for life or not. Those that tend to provide more care are usually altricial, because the baby is born with an underdeveloped brain. There is a great section on it here: http://www.stanford.edu/group/stanfordb ... icial.html
When I did it the whole test was basically identifying the birds by picture. No questions on behavior or morphology. Is this unusual?
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Re: Ornithology B/C

Postby AlphaTauri » March 15th, 2011, 12:22 pm

An all ID test? Yeah, that's unusual...and according to the rules, at least half the test should be on stuff other than ID (behavior, diet, other facts).
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Re: Ornithology B/C

Postby paleonaps » March 15th, 2011, 12:30 pm

Is there any way for you to be able to tell if a bird is altricial or precocial based on physical characteristics?

For example, on one of our practice tests it asked if an American Woodcock was precocial or altricial. It then asked us for 2 characteristics of this bird that showed that it was whichever type it was.

It has quite a bit to do with environmental characteristics, for example, whether pairs mate for life or not. Those that tend to provide more care are usually altricial, because the baby is born with an underdeveloped brain. There is a great section on it here: http://www.stanford.edu/group/stanfordb ... icial.html
When I did it the whole test was basically identifying the birds by picture. No questions on behavior or morphology. Is this unusual?
That's incredibly unusual. Nothing other than ID?
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