Hi there,
This is very tricky bird to find. this is a local name not very known like "زرزورة " for the swallow or "قعود" for little camel in Upper Egypt plus there is no context in your question or enough info about that bird over internet

but here what i was able to get
1- it's an immigrant bird
هنالك الكثير من الطيور المهاجرة التي تأتي السودان في مواسم مختلفة مثل الرهو والقيلدون والبط والاوز وأنواع من البجع،
http://www.sudanway.sd/geography_animals_birds.htm

2- it sways , so it should be short , quite plump and fluffy
دوقي دقيقون كوككن ـــ وتبيض طيورنا
قيلدوناقونكاسكن ـــ ويتمخطر القيلدون
مير أوني ملن أونكن ـــ وتلد كل عاقر
http://www.kowika.com/vb/showthread.php?t=20

3- it's Non-passerine, it feeds on seeds and insects
طيور القيلدون وصديق المزارع والسمبر والرهو وهي مخلوقات الله الجميلة
http://www.nubian-forum.com/vb/archive/index.php/t-6671.html

4-Comparing all of the above to a list of The Immigrant Birds in Sudan we can conclude that it suits the quail birds description
plus there is some similarity in the pronunciation
http://betasudan.com/immigrant_birds.htm
but which one, i can't be sure and based on my assumptions in the light of available info it should be one of these three
A-Common Quail
B-Common Buttonquail
C-Blue Quail

Feel free to check references links with above links.
http://en.wikipedia.org/wiki/List_of_birds_of_Sudan#Buttonqu...
http://www.sudaneseonline.com/cgi-bin/sdb/2bb.cgi?seq=msg&bo...

Hopefully that would be of any help :)

--------------------------------------------------
Note added at 2 days3 hrs (2011-09-22 12:59:48 GMT)
--------------------------------------------------

Hi i forgot to mention that it's edible
ترصدت عصافير آخر أيام الخريف في رحلتها نحو السافنا من مكمنها داخل أشجار الكتر، وذاقت لحم القيلدون والرهو
http://fdds.nazwa.pl/malik/stories_shira.htm
which adds another filtering step to narrow down the choices more and more towards Quail