How do tree frogs get the word out? New research published this week says male red-eyed treefrogs communicate with one another in aggressive contests by using vibrations they send through their plant perches.

The sharks may be swimming closer to shore to prey on booming numbers of gray seals.

People use tools. Other primates use tools. But crows?

Why do some animals have much better night vision than others? We'll talk about new research tracing the root of improved night vision to the architecture of the DNA inside the photoreceptor rod cells of the animals' eyes.

Ira talks with eminent biologist Edward O. Wilson and Bert Holldobler about ants, bees, and other social insects.

A specific blend of fatty acids signal death or injury to a variety of animals, providing a warning to others of the species.

Underwater digital tags show humpback whales use bubbles to trap schools of fish.

A study in Science suggests primates aren't the only mammals with empathy.

How do bees know when to emerge from hibernation? And what do they do all winter?

This lesson examine the nature vs. nurture debate. Personality and socialization will be defined. Freud's model of personality explained. It is 3 of 6 in the series titled "Nature vs. Nurture."

New research finds that one species of moth is capable of actively jamming the sonar used by moth-hunting bats.

Paul Andersen explains the niche. He gives three different pronunciations and two different definitions. He then discusses the competitive exclusion principle and the idea that a niche cannot be shared by two species.

Paul Andersen introduces the concept of ethology and contrasts kinesis and taxis. He explains the importance of courtship rituals in fruit flies. He finally shows you how to use a choice chamber to study behavior in pill bugs.

Paul Andersen explains the final 6 of 13 AP Biology Labs. The following topics are included: Transformation, Restriction Analysis of DNA, Energy Dynamics, Transpiration, Animal Behavior, and Enzyme Activity.

Paul Andersen explains how organisms regulate timing and control. Phototropism and Photoperiodism allow plants to respond to light throughout the day and year. Circadian rhythms are used in all organisms (including animals) as an...

Paul Andersen steps you through eight types of animal behavior. He starts by defining ethology and explaining that behavior varies from innate to learned. He discusses each of the following with examples; instinct, fixed action pattern,...

How can fish, birds, or bees coordinate their behavior -- and how does that group behavior apply to humans?

A lighthearted video showing animals, and a few children, doing silly things. (Length: 46 sec.)

An unusual video taken in Morocco that shows sixteen goats in a tree, having climbed there to get the fruit. (Length: 1 min. 2 sec.)

This downloadable song by Sara Jordan tells how different animals survive during the long cold winters. After listening to the four choices in this song, which do you think humans do?

Watch sandhill cranes take off, land and "dance" in this music video. [1:24]

Paul Andersen explains how organisms use information to communicate with each other. Signals are used by bees doing the waggle dance to communicate the location of flowers. Territorial markings are used by wolves to establish territory....