sibling rivalry
animal siblings compete for parental care or limited resources, which can sometimes result in siblicide
en-US/ˈsɪblɪŋ ˈɹaɪvəlɹi/
en-GB/ˈsɪblɪŋ ɹaɪvəlɹiː/
animal siblings compete for parental care or limited resources, which can sometimes result in siblicide