Maroon-fronted Parrot nests colonially in cavities and crevices in precipitous, tall limestone cliffs in or near mixed conifer forests; the nests themselves are in deep solution holes, making eggs and chicks very difficult to reach by predators or poachers (Juniper and Parr 1998, Enkerlin-Hoeflich et al. 2006, Ortiz-Maciel et al. 2010). Most cavities are used one or two years, but the most frequently used cavity was used continuously over 13 years (Ortiz-Maciel et al. 2014). There is some evidence of strong site fidelity to the same colony, if not the same nest hole, based on returns of birds carrying radio transmitters over several years (Enkerlin-Hoeflich et al. 2006).
Breeding pairs arrive at the cliffs between April and May, lay their eggs from July-August, chicks hatch August-September, and fledge in October-November (BirdLife International 2014); breeding behavior follows the fruiting pattern of the pine trees, with chick rearing synchronized to ripening of pine seeds (Juniper and Parr 1998, BirdLife International 2014). Adults are conspicuously noisy at nests (Enkerlin-Hoeflich et al. 2006).
The clutch size is one to four (Lawson and Lanning 1981).