I always thought it was pronounced MIH-gruh-to-ree also. Growing up in CA, we heard and used the word often due to the migratory birds, the swallows. For some unknown reason, they keep their own little internal time clocks and come and go from San Juan Capistrano on the same day every year. Now
that is a good example of migratory at it's finest!

Read on...
A city of southern California southeast of Santa Ana. Founded as a mission in 1776, it is famous for the swallows that supposedly return to the area every year on March 19 and depart on October 23, the date on which Saint John of Capistrano died in 1456. Population: 26,183.
Oh, and another thing, speaking of Santa Ana, for those of us who have lived in Southern CA , you would know that the Santa Ana winds are another form of migratory in it's own rite. One can feel the winds all the way up in Santa Barbara. It's mother natures own little quagmire: in other words, the hot, dry desert winds literally add fule to the fire when it comes to wild fires.

(Muy caliente! No,BD?)