Australian Raptors- low density?

["Michael & Janette Lenz" <>]

Please note that the northern hemisphere and asiatic regions have their fair share of corvids (ravens, crows, magpies and jays; and especially in urban areas at high densities) with equivalent roles and impacts on smaller birds as our currawongs and ravens here.

 

However, at least in the northern hemisphere densities of smaller breeding birds are often much higher than here, or clutch sizes are bigger, hence the many fledglings (espec. from tit species) provide welcome food for sparrowhawks etc..

 

Michael Lenz