Kleptoparasitism by Kingfisher versus Song Thrush

General birdwatching discussion, help with bird identification, and all other things relating to wild birds and birding in NZ that don't fit in one of the other forums.
Ian McLean
Posts: 35
Joined: Sat May 11, 2013 2:29 pm

Kleptoparasitism by Kingfisher versus Song Thrush

Postby Ian McLean » Fri Oct 05, 2018 12:08 pm

Hi there
Yesterday morning, whilst waiting for the Britomart train at Sunnyvale Railway Station in West Auckland, I noted a Kingfisher perched on one of the overhead electric cables. The Kingfisher was being mobbed by a Song Thrush with loud alarm calls & much wing flapping. Whilst this was happening, another Song Thrush appeared carrying an earthworm & flew down to the side of the rail tracks & attempted to feed a large & begging Song Thrush fledgling. Next the perched Kingfisher flew down to the Song Thrush fledgling & attempted to steal the earthworm now followed by two protesting adult Song Thrushes. By now there was much alarm calling & a second Kingfisher appeared, but I was unable to see whether the Kingfishers had snatched the earthworm from the Song Thrush fledgling. Unfortunately, my train then arrived & I was unable to observe any further action.
Just wondering whether anyone else has seen any similar interactions ?
It appeared that the Kingfishers intent was Kleptoparasitism rather than attempted predation of the Song Thrush fledgling, as the Song Thrush fledgling appeared larger than the Kingfisher !
Cheers
Ian

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