Caffeine content can range from as much as 160 milligrams in some energy drinks to as little as 4 milligrams in a 1-ounce serving of chocolate-flavored syrup. Even decaffeinated coffee isn't completely free of caffeine. Caffeine is also present in some over-the-counter pain relievers, cold medications, and diet pills.
wren. noun. 1  Any of various small brownish songbirds of the family Troglodytidae, having rounded wings, a slender bill, and a short, often erect tail. 2  All species but one, which is Eurasian, are found only in the Americas. 3  Any of various similar unrelated songbirds.
The cactus wren is the largest North American wren, and is 18-23 cm (7-9 inches) long. Unlike the smaller wrens, the Cactus Wren is easily seen. It has the loud voice characteristic of wrens, but its song is harsh and unmusical, and it is much less shy than most of the family.