During our stay, I observed the habits of some marine animals.

Next, he observed the habits of game, and the presence or absence of predatory beasts that kill deer.

Having observed the habits of the game, David now chose a favorable position to study those of the hunter.

I have observed the habits of hairs, and before many mornings there will arrive another as colorless as that last.

Paul never imagined, as he observed the habits of life of the two ladies, that they covered a gulf of ruin.

He has observed the habits of fruits and flowers to such purpose that he has performed miracles in the fields of floriculture and horticulture.