Tawny Frogmouths being mobbed

[Mike Honeyman <>]

For the second night this week we had a small party of Tawny  
Frogmouths in the garden at dusk - male, female and juvenile.
Both nights I've been alerted to their presence by the local  
Blackbirds going apoplectic clucking away and diving at the Frogmouths.
The Frogmoths themselves were fairly disburbed, moving from perches  
regularly and lots of head bobbing nervously.
My question is, why would the Blackbirds see Frogmouths as a threat  
that needs mobbing? We have Indian Mynas in the garden too, but they  
don't join in. On the first night a Brown Thornbill did seem to join  
in very briefly, though whether that was because it recognised the  
birds as a threat or whether it was just whipped up in to joining in  
I don't know.
Thoughts?

Mike Honeyman
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