Sex ratio bias and shared paternity reduce individual fitness and population viability in a critically endangered parrot

Sex‐biased mortality can lead to altered adult sex ratios ( ASR s), which may in turn lead to harassment and lower fitness of the rarer sex and changes in the mating system. Female critically endangered swift parrots ( Lathamus discolor ) suffer high predation while nesting due to an introduced mammalian predator, the sugar glider ( Petaurus breviceps ). High predation on females is causing severe population decline alongside strongly biased...