A paternity test to determine the sire of four Japanese macaques born since 2014 at Lincoln Park Zoo came back with a surprising result. 

A new team led by biologist Andrew Casper will expand Shedd Aquarium’s research of animals that live in local waterways—and how to protect them.

Conservation groups say the federal government needs to spend more to save monarchs, the beloved black-and-orange insects whose population has dropped in recent decades.

Monarch butterfly populations have dropped by more than 80 percent over the past two decades. A bill approved this week aims to boost the monarch’s recovery by protecting milkweed, a plant that serves as the butterfly’s only source of food. 

Meet Clive Stockil, a conservationist being honored in Chicago who is helping Zimbabwe’s rhinos bounce back from the threat of extinction.

How a Chicago community organization cultivates the scientific and cultural aspects of monarch butterflies.

Mayor Rahm Emanuel is leading a huge delegation in Israel on Monday evening. He tells us why.

As part of PETA’s eye-catching “Lettuce Ladies” campaign, South Elgin native Mysti Lee travels the globe promoting animal rights. 

Along Wolf Lake on Chicago’s Southeast Side lies the only Illinois state park within city limits, where visitors can find fishing spots, biking trails – and invasive species.

Why native trees and plants not only look good but are better for local wildlife and the environment. A discussion with author Charlotte Adelman.

The young males belong to a highly social zebra species and will eventually share a habitat with the zoo’s giraffes. 

A first-of-its-kind study shows that giving people a financial incentive to save trees is an effective strategy for fighting climate change.

Life as an amphibian is no easy hop through the woods. Why Chicago scientists are measuring levels of cortisol (the stress hormone) in Lake County frogs.

Lincoln Park Zoo will give away hundreds of condoms this week as part of a nationwide outreach program to draw attention to the link between human population and endangered species.

An update to our March story about bald eagles returning to Cook County.

The ethical debate over zoos – and whether animals belong in them – has resurfaced over the past year, and now Brookfield Zoo is joining the discussion.