Hello Ian (Tom) and all,
Your Corvid-Call Quiz is a step in the right direction and good fun but more
confusing than of help. All our corvids have a wide repertoire, and it didn't
compare the equivalent calls of each species. As you pointed out, it omitted
the New-England Raven and as you didn't point out, the Australian Raven from
Western Australia, a very different sounding bird.
Pity you didn't contact me about the quiz, I could have helped as I probably
have the biggest collection of corvid calls in Australia, including New England
Ravens. Many of these calls are available on my website but the number I can
present is limited by space. I am always willing to help anyone interested.
Your comment about being confused by Forest Raven/Little Raven calls in
southern Victoria is an interesting one. There could be intermediates - nobody
knows. This is also discussed on my website under the text for Forest Raven.
Little Ravens vary a fair bit in size and also voice. The smaller birds from
the inland have the highest pitched voices and the bigger birds from alpine
areas have deeper (sounding more like Forest Raven ) calls. These alpine birds
do move down to the coastal regions in winter, so in places like Lakes Entrance
both species can occur, and identifying them by call is tricky to say the least.
Regards
Graeme Chapman.
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