[Answer] 2. Which aquatic mammal possesses a single forward-facing tusk of up to ten feet in length, earning it the scientific name Monodon monoceros or "onetooth unicorn"?

Step 1 : Introduction to the question "2. Which aquatic mammal possesses a single forward-facing tusk of up to ten feet in length, earning it the scientific name Monodon monoceros or "onetooth unicorn"? "

...1. beluga whale 2. great tusked sperm whale 3. irrawadi dolphin 4. narwhal Narwhals are also noted for their deep-diving abilities. They routinely descend to depths of up to one mile below the surface.

[Answer] 5. 1) It possesses one of the highest metabolisms of warm-blooded vertebrates.2) The Calliope type is North America's smallest bird.3) Aztecs believed dead warriors were reborn as them.Can you name this bird?

Step 1 : Introduction to the question "5. 1) It possesses one of the highest metabolisms of warm-blooded vertebrates. 2) The Calliope type is North America's smallest bird. 3) Aztecs believed dead warriors were reborn as them. Can you name this bird?"

...1. Robin 2. Dodo 3. Skylark 4. Hummingbird The hummingbird flaps its wings up to 80 times per second which creates the hum by which it is named and gives them the ability to hover mid-air. It belongs to the family Trochilidae and are found in the wild in the Americas. One important physical characteristic of the hummingbird is its long, thin bills. It combined with its long, retractable tongue enable it plunge for nectar deep within the tubular throat of flowers. In addition hummingbirds prey on insects and spiders to meet their protein and vitamin requirements. The speed of the wing flapping helps sustain the hummingbird's high metabolism. The heart rate may reach over 1000 beats per minute and in order to maintain the energy requirement it must typically consume more than its weight in nectar every day. It takes a number of small meals before resting. On average, about 20% of its day is feeding while 80% is spent perching. While the Calliope is the smallest bird in Canada and the United States, the Bee Hummingbird is the world's smallest bird. It weighs about 1.8 grams and grows to be about 5 centimeters long, approximating the size of a large bee. It's known to take small amounts of bark and lichen to build small nests to lay eggs that are smaller than a coffee bean. Many have compared it to a tiny jewel due to its bluish green iridescent colors found on its feathers. FUN FACT: The hummingbird is the only species of bird known to fly backwards.