Sunday Sketch: Freckled Hawkfish

The freckled hawkfish, also known as Paracirrhites forsteri, belongs to the Cirrhitidae family. It is the most abundant type of hawkfish found in the Red Sea, which is the saltiest and warmest sea on Earth. Hawkfish primarily feed on small fish and invertebrates living among coral. Art by Darien Satterfield, Instagram & Twitter & Tiktok…

Field Frame Friday: Panda Personas

Did you know that despite sharing a common name, giant pandas and red pandas are not closely related? They were both given the name panda simply because both specialize on eating bamboo, and the word panda is an adaptation of nigala ponya which means “bamboo eater” in Nepalese. Red pandas are actually in an entirely separate family (Ailuridae) of which they are the sole living…

Sunday Sketch: Peacock Spider

In peacock spiders, to initiate reproduction, male spiders perform a mating dance for the females, wiggling around and displaying vibrant colors on their bodies during the dance. In response, females either mate with the males as a sign of approval or consume them as a form of rejection. Art and fact by CocoFu, Instagram @cocofufufufu…

Sunday Sketch: Opossum

The opossum, the only marsupial in the United States, often has thirteen nipples. It has so many because it can give birth to up to twenty young at once, and only those that receive milk survive. Art and fact by Kirsten Sheehy,  Twitter @1010sheehy   [Edited by Nicole Rodrigues] Reference: Marable, A.D., & Smith, M.D….

Creature Feature: Jackalope

We’re discovering an incredibly elusive animal in the latest, very serious article from Creature Feature!

Sunday Sketch: Coffin Fly

Phoridae is a family that contains insects, commonly known as coffin flies. They are referred to as ‘coffin flies’ due to their abundance in decaying corpses. Phorid flies are characteristically hump-backed in appearance and are known to run instead of fly. Art and fact by Allen Chew, Instagram & Twitter @toldentops [Image and text edited…

Sunday Sketch: Blackbelly Triggerfish

Rhinecanthus verrucosus, also known as triggerfish, are durophagous, which means that they eat hard shelled and tough prey like snails or clams. To accommodate this diet, they possess extremely strong jaws with very large muscles relative to other fish. Art and fact by Darien Satterfield, Instagram & Twitter & TikTok @DiverDarien  [Edited by Nicole Rodrigues]…

Field Notes: My Time with Titis

The worst part is all the sweat bees. The mosquitos can be repelled, but nothing stops the sweat bees. The ants don’t want to mess with you. They’ll defend themselves and their homes. They’ll attack if frightened and confused, but they have work to do and aren’t easily distracted. The sweat bees are at work…

Sunday Sketch: Tabanidae Family of Flies

Tabanidae is a family that contains insects commonly known as horse flies, deer flies, or gadflies. Tabanids are large and conspicuous insects. While the males are mostly harmless, females have piercing mouthparts that they use to draw blood. Art and fact by Allen Chew, Instagram & Twitter @toldentops [Edited by Nicole Rodrigues] Reference: Chainey, J.E….

Sunday Sketch: Nematode

Caenorhabditis elegans is a nematode. It can survive extreme cold weather at -80°C by entering a state of suspended metabolism called cryptobiosis. A similar mechanism to survive extreme cold weather is used by a newly discovered species found in the Siberian Permafrost. Art and fact by Wenzhe Li, Instagram @dustybutkindofnice [Edited by Nicole Rodrigues] Reference:…

Throwback Field Notes: Ryane’s first field season at Chicken Camp!

This time of year, many researchers are gearing up to embark on their spring field seasons. Today, we’re featuring a throwback to this fun Field Notes about Animal Behavior alumni Ryane’s first field season in 2015! I’ve recently returned from my first field season and as I’m settling back into Davis, I wanted to take…

Field Frame Friday: A Temporary Grouse House

Biologist Nicole Lindenauer developed an automated two-stage pen to gently release Greater Sage-Grouse families into the wild, which will help aid a struggling population’s genetic diversity.

Sunday Sketch: River Otter

The North American River Otter (Lontra canadensis) is known for being a skilled predator, consuming a variety of animals like crabs, fish, small mammals, reptiles, birds and more! They will choose to attack larger prey first, to maximize the amount of energy they receive from their food. Art by @miri_leshem_pelly [Edited by Isabelle McDonald] Reference:…

Field Frame Friday: Rural Raccoons

Raccoons are versatile mammals that can adapt to both city and wilderness settings. Contrary to their “trash panda” perception, rural raccoons are cunning foragers, seeking out seasonal diets of worms and insects in the spring, and fruits and nuts in the fall. Encounters with them are invariably special.

Sunday Sketch: Brown bears

Brown bears (Ursus arctos) are native to an expansive home range, including Eurasia and North America. Their diet consists of a wide variety of foods like meats, berries, and other plants. They perform a behavior called caching, which is where they hide food to save it for later; they will often need to guard their…

Creature Feature: Native Freshwater Mussels

California’s freshwater streams are home to a surprising variety of shellfish. Clusters of bivalves nestle themselves among the small pebbles and overhangs of riverbeds, sometimes almost indiscernible from their surroundings. Though these organisms may not be in the spotlight, each one of the species plays an important role in riparian ecosystems. None are more important…

Sunday sketch: the Yeti crab

The Yeti crab (Kiwa hirsuta) live in what are called cold seeps, which are areas of the ocean floor where there is a plethora of sulfides and methane that seep from fissures in the ground. In order to thrive in these harsh conditions, Yeti crabs have an epibiotic relationship with bacteria that live on the…

Field Frame Friday: Foxes and Food

Island Foxes (Urocyon littoralis) inhabit the California Channel Islands. Over the course of the last 150 years or so, the ecology of each island has changed substantially, leading to different outcomes for different fox populations. The fox above is from Santa Cruz Island, where the population is currently healthy, although the foxes there are famous…

Sunday sketch: Badger behavior

The European badger (Meles meles) has a reputation for being a feisty creature, likely due to their territorial nature during the breeding season, when these animals are quick to fight one another. However, during the rest of the year, European badgers are very social, spending time grooming one another and denning together. Art by @miri_leshem_pelly…

Sunday Sketch: Magical moths

The polyphemus moth (Antheraea polyphemus), is a giant silk moth, with eyespots on its wings. The moth uses these spots to perform a distraction display to threaten predators, which essentially makes the insect appear larger and more threatening to whatever is trying to eat it. The moth gets its name from the Greek myth of the…

Sunday Sketch: Pacific Hagfish

The Pacific Hagfish is often referred to as the slimiest fish in the sea due to its slime pores that produce copious amounts of colorless slime. This slime serves as a defense mechanism against predators by clogging up their gills, aiding the hagfish in evading threats. Art and fact by @Squidtoons [Edited by Nicole Rodrigues]…