Sound trap in a mixed flock of Gulls.

Unmodified recording. At least two loons were present.

Possibly 2 individuals involved with 37 calls picked up over a period of 4 minutes during the early hours on Lake Erie with over 70 calls in total in just over 2 hours.

Agressive interaction between two adults, most probably males. The two individuals were silently circling each other, dipping frequently their beak in the water. Our canoe was positioned about 20 meters from the two loons.

Suddenly, Common Loon A started vocalizing a "yodel" while standing upright in the water in the "vulture position", wings fully extended and facing Common Loon B.

Afterwards, Loon A went back to a horizontal position and started a series of 14 "tremolos" while paddling aggressively with its wings, neck fully extended towards Loon B. This "paddling" sound can be clearly heard in the recording. All the while, Loon B was slowly retreating. At the end, after a 13 seconds silence, Loon A emitted one last "tremolo" while Loon B had fully retreated.

Four Common Loons were resting together in the water, approximately 30 meters from shore. Surrounding vegetation : deciduous forest (maple, yellow birch). Only one of the birds was vocalizing, but in a few instances a faint reply is heard. 24 oC, cloudy, light breeze.

Unedited recording. Recorded after dusk, the birds started up calling around this time and went on through about midnight. The main individual in the recording seemed very close to shore. All three types of calls can be heard in the recording - yodel, wail, and tremolo (which is why I did not select some of the pitch/call note options).

Two Sennheiser Mics with Marantz cassette recorder

Two Sennheiser mics with Marantz cassette recorder

Three birds in flight just north of Hyland Lake.

high pass filter, noise reduction, https://flic.kr/p/2i6Xydu