April 3, 2012: We've scoured the Web to find the best and most compelling animal stories, videos and photos. And it's all right here.

Public Meets Anori, Knut’s Half-Sister, at German Zoo

Knut, the late polar bear cub who stole the hearts of millions at a Berlin Zoo after his mother rejected him, has a half-sister named Anori. The fluffy, 3-month-old cub made her debut at Germany’s Wuppertal Zoo last week. Luckily, Anori, who has the same father as Knut, seems to have a sweet bond with her mom. — See more photos at People Pets

Dogs Also Make Bad — and Dangerous — Decisions When Tired

Much like their human counterparts, a new study has found that pups who are tired are less likely to exert self-control, thus putting themselves in riskier situations. This “self-control depletion” was once a phenomenon believed to happen only in people, but researchers discovered that mentally fatigued dogs also don’t think straight. — Read it at Science Daily

Denver Anchor Bitten By Dog Returns to Her TV Post

Kyle Dyer, the anchor who was bitten by a dog on live TV two months ago, was back on the air for the first time on Monday and discussed the incident. “I just really never knew that [dog bites] happened so often,’’ said Dyer. “Hopefully it’s raised a lot of awareness of being careful.” — Read it at Today and watch her broadcast

Black howler monkey

Howler Monkey Born at National Zoo

The Smithsonian National Zoo in Washington, D.C., is now home to the first surviving black howler monkey born at the zoo. Although zookeepers don't yet know if the baby is a male or a female, male howler monkeys are able to broadcast their voices through three miles of dense forest, earning the species the title of the loudest animal in the New World. — Read it at the National Zoo

Sparrows Change Their Tune to Be Heard in Busy Cities

So how can the little voice of a sparrow be detected above the din of traffic in a major city? Apparently, the birds raise their voices and sing a different song, even changing their dialect, just like people from different parts of the country. — Read it at Science Daily