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[[Ofbyld:Juancito2.png|thumb|220px|It mûldier ''Juancito'' op in ekspedysje yn [[Fjoerlân]], [[Argentynje]]]]
[[Ofbyld:Momo 260905.jpg|thumb|220px|Jong mûldier]]
[[Ofbyld:Morocco Fes Camel.jpg|thumb|220px|Mûldier yn it Medina-kertier yn [[Fes]], [[Marokko]]]]
In '''mûldier''' is in krusing tusken in [[Hynder|hynstemerje]] (''Equus caballus'') en in [[ezel|ezelshynst]] (''Equus assinus'').
Horses and donkeys are different species, with different numbers of [[chromosome]]s. Of the two [[F1 hybrid]]s between these two species, a mule is easier to obtain than a [[mûlezel]] (theneisiet offspringfan ofin ahynst maleen horsein and a female donkeyezelinne). All male mules and most female mules are ûnfruchtber.
The size of a mule and work to which it is put depends largely on the breeding of the mule's [[merje]]. Mules can be lightweightlicht, medium weight, oras evenfrijwat swier, when produced from draught horse [[mare]]s, of moderately heavy weight.<ref>{{aut|Ensminger, M. E.}}, ''Horses and Horsemanship: Animal Agriculture Series''; Interstate Publishers, Danville, IL.,1990. sdn. 85-87.</ref>
Foarstanners wolle hawwe dat it mûldier "more patient, sure-footed, hardy and long-lived than horses, and they are considered less obstinate, faster, and more intelligent as ezels."<ref>{{aut|Jackson, Louise A.}}, ''The Mule Men: A History of Stock Packing in the Sierra Nevada'', s. 5 (Mountain Press Publishing Co, Missoula, [[Montana]], 2004). ISBN 0-87842-499-7</ref>
== Skaaimerken en prestaasje ==
TheIt mediantrochsneed weightgwewicht rangefan forin amûldier muleleit istusken between aboutde 370-460|kg.<ref>{{cite encyclopedia | title = Mule | encyclopedia = [http://books.google.com/books?id=g50MAAAAYAAJ&pg=PA15&lpg=PA15 The Encyclopaedia Britannica: A Dictionary of Arts, Sciences, and General] | volume =diel XVII | pages =side 15 | publisher = Henry G. Allen and Company | year =, 1888. | accessdate =Sjoen op 2007-12-26 }}</ref> Although it depends on the individual animal, an army mule can "carry up to 72 kg and walk 26 km without resting."<ref>[http://news.bbc.co.uk/2/hi/south_asia/4354440.stm | work=BBC News | title=Beasts ease burden of quake victims | date=2005-10-19 | accessdate=2010-04-06]</ref> In general, a mule can be packed with "dead weight" of up to 20% of its body weight, or approximately 90 kg.<ref>[http://www.hunterspec.com/Updateable/update_display.cfm?pageID=2048&categoryID=12 "More With Wayne Carlton On Elk Hunting"] ''Hunter Specialties''. Web site accessed June 1, 2009.</ref> The average equine in general can carry up to approximately 30% of its body weight in "live" weight, such as a rider.<ref>[http://aerc.org/AERC_Rider_Handbook110303.asp|title=Chapter 3, Section IV: Size|author=American Endurance Ride Conference|accessdate=2008-08-07|month= November | year= 2003|work=Endurance Rider's Handbook|publisher=AERC]</ref> However, while a few mules can carry live weight up to 160 kg the superiority of the mule becomes apparent in their additional endurance.
The virtue of the mule is that a mule has the size and ground-covering ability of a horse, but is comparatively stronger than a horse of similar size and inherits the endurance and disposition of the donkey father. Mules also tend to require less food than a horse of similar size.
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