Bitterns and Herons

The Least Bittern song is a quiet cu-cu-cu (May, NJ).













A loud kaa-kaa-kaa is often heard later in the breeding season, especially early in the morning (July, NJ).











This is a juvenile Least Bittern, still with down on its head, that called almost continuously for the 45 minutes I watched it. Interestingly, it changed its call periodically. These are the 3 different calls I heard (July, NJ).
1











2










3












Presumed American Bittern call in nocturnal flight (2.38am, Oct, PA)












(5.14am, Sep, PA)












Green Herons in flight (Aug, NJ).












Black-crowned Night-Herons near roost and calling in flight shortly before dawn (Apr, NJ).












Great Blue Heron (Aug, NJ).













Calls by a flock of perched Great Egrets, mostly croaks but also a few higher calls (heard in the first 12s).
(Sep, NJ).