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Bird Quizz (RV)

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Philip1
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Bird Quizz (RV)

Unread post by Philip1 » Mon Dec 30, 2013 8:37 am

onewithnature wrote:Southern Ground Hornbill?


I will give it to you OWN. :thumbs_up:

"Ground Hornbills nest high in large trees with sizable cavities and in holes on cliffs. In 80% of clutches, the breeding female lays two eggs and the first egg is laid three to five days before the second. Since incubation commences with the first egg, the chicks hatch 3 to 5 days apart. The older chick may weigh 250g by the time the second hatched chick hatches, at about 60g. The eldest chick always out-competes its younger sibling for food and the younger dies of starvation within a few days from hatching

A Southern ground hornbill can live up to 50 or even 60 years.
A juvenile has beige facial skin up to about two years old. The skin then becomes mottled with red and blue spots. The facial skin will be entirely colored at about four years old".
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onewithnature
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Re: Bird Quizz (RV)

Unread post by onewithnature » Wed Jan 08, 2014 12:59 am

What is a diagnostic feature of birds, i.e. which is only found in this group of animals and no other?
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Philip1
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Re: Bird Quizz (RV)

Unread post by Philip1 » Wed Jan 08, 2014 8:47 am

Feathers are the diagnostic feature of birds.
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wildflowergirl
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Re: Bird Quizz (RV)

Unread post by wildflowergirl » Wed Jan 08, 2014 8:48 am

Philip1 wrote:Feathers are the diagnostic feature of birds.


agree :D
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Re: Bird Quizz (RV)

Unread post by Phokojwe » Thu Jan 09, 2014 12:11 pm

Agree :think: feathers :pray:
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Re: Bird Quizz (RV)

Unread post by onewithnature » Fri Jan 10, 2014 12:44 am

Philip1 wrote:Feathers are the diagnostic feature of birds.


:thumbs_up: Correct, although there is now some controversy even over this "fact" as the status of Archaeopteryx is under question. :hmz:
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Re: Bird Quizz (RV)

Unread post by wildflowergirl » Mon Jan 13, 2014 2:22 pm

Philip :thumbs_up: :clap: :clap:
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Philip1
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Re: Bird Quizz (RV)

Unread post by Philip1 » Thu Jan 16, 2014 8:20 am

What two systems of a Bird are uniquely adapted for flight?
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onewithnature
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Re: Bird Quizz (RV)

Unread post by onewithnature » Fri Jan 17, 2014 5:57 am

There are more than two. I will exclude feathers for this question as this may be too obvious. :wink: Thereafter, I would say that the two most important adaptations that facilitate flight is a lightweight skeleton (lightweight bones) and air-filled cavities linked to the respiratory system that increase buoyancy.
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Philip1
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Re: Bird Quizz (RV)

Unread post by Philip1 » Fri Jan 17, 2014 7:34 am

QWN....You are right in a way, but i am looking for Two systems that are uniquely adapted for flight. (You mentioned one in your answer). :)
"Lose yourself in Nature and find Peace!" (Ralph Waldo Emerson)
UNITE AGAINST POACHING...What we protect,
do not let poachers take it away!

Extinction is forever and survival is up to---every last one of us!

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Re: Bird Quizz (RV)

Unread post by Phokojwe » Mon Jan 20, 2014 11:18 am

In addition to OWN's reply, birds also have unique digestive systems which are highly adapted for rapid digestion.
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Philip1
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Re: Bird Quizz (RV)

Unread post by Philip1 » Mon Jan 20, 2014 11:24 am

Own and Phokojwe :) Over to you.

Birds have digestive and respiratory systems that are uniquely adapted for flight.
"Lose yourself in Nature and find Peace!" (Ralph Waldo Emerson)
UNITE AGAINST POACHING...What we protect,
do not let poachers take it away!

Extinction is forever and survival is up to---every last one of us!

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onewithnature
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Re: Bird Quizz (RV)

Unread post by onewithnature » Tue Jan 21, 2014 1:12 am

Over to you, Phokojwe ... :thumbs_up:
EVERYBODY'S TR!
TR: A NEW DAY IS S-OWN
TR: NECTAREAN NICETIES OF THE NORTH
TR: PRIMEVAL PLEASURE

"Outside of a dog, a book is a man's best friend. Inside of a dog, it's too dark to read." (Groucho Marx)

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Phokojwe
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Re: Bird Quizz (RV)

Unread post by Phokojwe » Tue Jan 21, 2014 3:06 pm

Several owls species have "ear" tufts on their heads but they aren't ears at all. What is the purpose of these tufts?
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onewithnature
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Re: Bird Quizz (RV)

Unread post by onewithnature » Tue Jan 28, 2014 2:07 am

This is a subject that still has hypotheses, none of which have been entirely proven. The three main contenders seem to be that the tufts are used for mimicry, recognition, or camouflage. The mimicry theory suggests that the tufts resemble mammalian ears and so make the owl appear more frightening to mammalian predators. This theory would then suggest that owls and mammalian predators would closely co-exist, which is not always the case. The recognition hypothesis asserts that the tufts allow similar species to identify each other at night by silhouette, but this hypothesis falls down because it has been shown that similar species usually locate members of their own through vocalisation, and long before sight is used. The most attractive explanation seems to be that the tufts are used to assist in camouflaging the birds in forest canopies because, when threatened with danger, the owls will elongate their bodies and erect their ear tufts, thereby breaking up their shape and making them look more like branches. Also, this explanation suggests that tufted owls should be nocturnal and roost during the day, as night-roosting owls would not need this camouflage. As almost all populations of tufted owls are both nocturnal predators and arboreal, the camouflage theory seems to be the best to-date.
EVERYBODY'S TR!
TR: A NEW DAY IS S-OWN
TR: NECTAREAN NICETIES OF THE NORTH
TR: PRIMEVAL PLEASURE

"Outside of a dog, a book is a man's best friend. Inside of a dog, it's too dark to read." (Groucho Marx)


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