| Both species need large areas of fens and wetlands and are highly intolerant of human disturbance at nest sites. |
| The disturbance to proper waterplane shape is the cause of many speed and handling related problems. |
| Along with windstorms and fire, beavers were major agents responsible for disturbance in eastern North America. |
| The appearance of flushing of the face is due to disturbance in pressure in the carotid arteries and jugular veins. |
| Food was delivered in a wash bottle to train test subjects to investigate surface disturbance. |
| Cold weather, a lack of food or disturbance can however cause wintering birds to seek new sites. |
