Clinal polymorphism variation in the Booted EagleHieraaetus pennatus: the influence of climate during the breeding season

Inheritance of plumage morphs in Little Eagles Hieraaetus morphnoides in northern New South Wales

“…We further hypothesise that the morphs may have differential survival or productivity in different environments as an area for potential future study (cf. relevant findings reported for the Booted Eagle by Bosch 2019 andBosch et al 2019).…”

“…Comparative data are lacking on the fledgling morph ratio in, for example, humid versus arid regions to see if it tracks parental morph ratio within a given region. The morph ratio in the Booted Eagle also varies regionally, with a similar trend in relation to arid versus humid environments (Gjershaug et al 2009;Bosch 2019).…”

“…a few cases of progeny over 2-3 consecutive years from individual pairs, although most events are for different pairs and/ or decades). Data pooled from the 1980s (Debus 1989, 1991), 2006(Debus 2011-2019(Larkin et al 2020SJSD & CL unpubl. data).…”

“…The number of pairs and their morph combinations were tallied from studies of breeding pairs spanning three time periods: the 1980s (Debus 1989(Debus , 1991, 2000s (Debus 2011-2019(Larkin et al 2020SJSD & CL unpubl. data), not double-counting instances of the same sex/morph combination (e.g.…”

Accounting for clinal variation and covariation in the assessment of taxonomic limits: why we should remember the ‘rules’

“…2003, Amar et al . 2014, Bosch 2019). Such variation may be apparent across very small geographical distances and even within populations on small islands (Wunderle 1981, Milá et al .…”