A full grown 18 month old emu stands about 6 feet and weighs an average of 120 lbs (ref American Emu Assn). When facing danger it can sprint 30 mph for 30 minutes (half the speed of an ostrich) and then suddenly drop to the ground puffing up its camouflage feathers to look like a rock.
Amazing isn’t it that those toes can support that weight. According to the Royal Veterinary College in London (Nov 2013) studies have suggested emus might be an ideal model species for looking at orthopedic issues such as hip joint problems for human applications.
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