| The photo below was taken in attempts to show the powder down feathers which outline the furcular hollow and are unique to herons and bitterns. |
| For many years male bitterns have been considered at times bigamists. |
| Three poachers were caught red-handed trying to lure watercocks and yellow bitterns by using a recording of a bird's mating call here yesterday. |
| Volunteers at Marbury Country Park, near Northwich, spotted three booming bitterns, members of the heron and stork family, feeding among reedbeds. |
| He reported that bitterns were beginning to practise their boom on the reserve again but would not find their full voice until April or May. |
| The date of the first booming bitterns varies each year, although there has been a trend towards them starting to boom earlier in recent years. |
