Catechism of the Catholic Church §342 — excerpt
The hierarchy of creatures is expressed by the order of the "six days", from the less perfect to the more perfect. God loves all his creatures and takes care of each one, even the sparrow.
This translation is under copyright, so only the cited words are quoted here. Follow the link for the full text. Translation: English translation of the Catechism of the Catholic Church, 2nd ed. (Libreria Editrice Vaticana), as posted at vatican.va.