martín
/maɾˈtin/ · B2 · noun · m
black-crowned night heron
🐦 martín = Martin, a man's name, as in 'Martin the night-shift bird'
Spanish martín (pescador) is a bird name that matches the given name Martín, so link the heron to a person called Martín who works nights. The black-crowned night heron hunts at dusk and after dark, which fits the night-shift tag.