Jersey dairy calves (like the cutie seen here) are smaller than their Holstein counterparts, which are the black and white spotted dairy cows. Jerseys typically weigh around 60 pounds (27kg), compared to Holstein calves who can be born at over 100 lbs (45kg)! These are the two most common breeds of dairy cows in the…
Category: Field Frame
Field Frame Friday: Simply Ravenous
Common Ravens (Corvus corax) are famously smart, adaptable and opportunistic, and while these traits serve them well, they can often get them into trouble, too. What kind of trouble do you think the raven on the left got itself into to earn a bright blue tag and the attention of scientists? The tagged raven and…
Field Frame Friday: Who’s this chick??
A Spotted Sandpiper (Actitis macularius) chick shows off its shiny new leg band, which contains a unique ID number used by researchers to identify this individual. This chick will continue growing throughout the summer, migrate south for the winter, and perhaps return to its birthplace in the Mono Basin to breed next summer. [Photo and…
Field Frame Friday: Turtle party!
Meet Testudo hermanni hermanni, a Mediterranean tortoise present in Italy, France and Spain. Its captive breeding was made necessary by the destruction of its native habitat. The challenge for current breeders, unlike most of the species bred as pets, is to maintain as much as possible the purity of the species, subspecies and, if possible,…
Field Frame Friday: This is how I show my love – QUAIL
A California Quail (Callipepla californica) poses majestically on a shrub. California Quail participate in brood-mixing, where multiple female quail will raise multiple offspring (related and not-related) in communal family groups. It is suggested that females involved in communal family groups also live longer than those in single family groups. There are benefits of being a…
Field Frame Friday: Flexy Fanaloka
Check out this trail cam photo of a spotted fanaloka (Fossa fossana) taken in Madagascar during Meredith Lutz’s field season. Spotted fanaloka adjust their activity patterns to avoid humans and invasive carnivores, like dogs, during seasons of increased human and dog activity. [Photo and Caption by Meredith Lutz] Reference: Farris, Z. J., Gerber, B. D.,…
Field Frame Friday: Where’s the beef? Being social!
Beef cattle are social creatures! They form complex social groups and hierarchies made up of close companions and individual acquaintances. Next time you are observing cattle grazing or driving through some pastures, check out their herd structures! [Photo and caption by Alycia Drwencke] Sowell, B. F., Mosley, J. C., & Bowman, J. G. P. (1999,…
Field Frame Friday: We all like a well-groomed friend
Grooming rituals are very common in macaques. Grooming not only keeps monkeys healthy, but it also reinforces social structures and bonds between animals. In this photo, a male macaque named Mario is grooming a female macaque named Gao-luck. [Photo and caption by Nalina Aiempichitkijkarn] Reference: Henazi, S. P., & Barrett, L. (1999). The value of…
Field Frame Friday: Mom’s Milk
This beef calf, with her mom hanging out closely in the background, will stay with her for multiple months on pasture before she gets weaned. Weaning is the process where her mother will not allow her to drink milk from her teats any more. This naturally happens around 6 months of age! [Photo and caption…
Field Frame Friday: Who else hates stopping on a road trip?
Each year gray whales migrate about 10,000 miles each direction moving from Mexico to Alaska and back. As they migrate north, the whales will stop occasionally to rest or feed, but as they migrate south, it appears they do not stop. [Photo and caption by Alycia Drwencke] Reference: Pike, G. C. (1962). Migration and feeding…
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