" 
 ::""It will drink at intervals of three days or less when it has access to water"" vs ""Giraffes may drink at intervals of three days or less when water is available""; ""In low intensity necking, the combatants gently rub their heads and necks together and lean against each other"" vs ""At low intensity, they proceed to rub heads and necks gently together, and may lean heavily against each other"".   "