The Mariana Kingfisher was recorded in a forest-bird survey on Tinian. A sample collected on Saipan is described as white-headed in a phylogenetic study.
The 2015 phylogenetic supplement describes the sampled Saipan T. albicilla as white-headed.
Tinian surveys in 2008 and 2013 recorded this kingfisher in limestone forest, herbaceous scrub, secondary forest and tangantangan cover.
An extinction-risk assessment has not been added yet.