The parent crested serpent eagles are highly protective of their young. They are also the Taiwanese raptors that most often communicate with their young by voice. When an eaglet begs for food it gives out piteous squeaks, and if the male bird is away from the nest too long, the female will call to him with piercing cries.
大冠鷲父母護子心切，牠們更是本地最常以叫聲進行親子溝通的猛禽，幼鳥索食時會發出淒厲的口哨聲，當公鳥離巢太久，母鳥也會發出尖銳嘯聲呼喚公鳥。