Agelaius

: Young typically leave the nest 10–14 days after hatching. They are fed by parents for another 2–3 weeks before becoming independent.

: A single male often defends a territory containing a "harem" of up to 15 nesting females . agelaius

: Males are aggressively defensive, famously attacking much larger animals, including hawks, horses, and humans, if they approach the nesting site. : Young typically leave the nest 10–14 days after hatching

: They typically breed in marshlands, wetlands, or grassy areas near water, with females building deep cup-shaped nests lashed to reeds like cattails. Species Profiles yellow-souldered blackbird revised recovery plan - FWS ECOS famously attacking much larger animals

: They undergo a "thermoregulatory metamorphosis" over approximately 12 days , transitioning from an ectothermic-like state to being able to maintain their own body heat.