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As night falls, a tiny, furry creature with enormous eyes emerges from a hole beneath a scrubby desert bush. Always alert to a sudden attack by one of its many predators, the little kangaroo rat searches for food. It munches on tasty grass seeds until it is full, and then scurries back to its safe, underground home with its cheek pouches stuffed with food it will eat later. Packed with information perfectly suited to the abilities and interests of its young audience, this colorful, fact-filled volume gives readers a chance not only to learn, but also to develop their powers of observation and critical thinking. Activities, such as describing the kangaroo rat to a friend and discussing critical thinking questions, give readers a chance to gain insights beyond the facts and figures. From taking a peek inside the kangaroo rat’s underground home, to learning how the tiny creature can jump many feet in the air to avoid predators such as coyotes and snakes, this book makes learning about the habits and habitat of these nocturnal desert animals an enjoyable, satisfying experience.
The Gulf Coast kangaroo rat (Dipodomys compactus) is an endemic Texas species belonging to the family Heteromyidae. Many heteromyid species, especially kangaroo rats, are highly specialized nocturnal granivorous rodents with external fur lined cheek pouches, bipedal cursorial locomotion, and adaptations for arid and desert conditions. Despite being one of six Texas endemic mammals, few studies have been conducted on habitat requirements, movement, and basic ecology of the Gulf Coast kangaroo rat with no long-term research. From April 2016 to March 2017, I have seasonally monitored burrowing activity of Gulf Coast kangaroo rats and recorded vegetative parameters at 63 randomly selected sites on a working cattle and wildlife ranch located in Guadalupe County, Texas. Sites with active burrows or a history of occupancy were monitored monthly. Within a 10-m radius plot at each site and using the Daubenmire frame cover estimate technique, I recorded percent cover of the following cover classes: bare ground, standing dead vegetation, litter, living grass, and living forbs. Additionally, I identified to the lowest taxonomic level the dominant live green grass and forb species in each Daubenmire frame and recorded the height of the tallest live grass, live forb, and standing dead vegetation. Using a spherical densitometer, I determined the percent woody canopy coverage at each Daubenmire frame. Twenty-two of 63 sites were occupied. Using Nested ANOVA, I found significantly greater cover of litter, taller standing dead, and taller grass (p
"Life History of the Kangaroo Rat" is research on a kangaroo rat's morphology, looks, build, and habits. The book is written by the entomologist from the Agricultural Experiment Station, University of Arizona, Charles T. Vorhies, and the biologist from the Bureau of Biological Survey, U. S. Department of Agriculture. It shares details of how kangaroo rats build their homes, store their food, their natural enemies, and many more.
This bulletin, a joint contribution of the Bureau of Biological Survey and the Arizona Agricultural Experiment Station, contains a summary of the results of investigations of the relation of a subspecies of kangaroo rat to the carrying capacity of the open ranges, being one phase of a general study of the life histories of rodent groups as they affect agriculture, forestry, and grazing.
California is home not only to many endangered species, but also to entire ecosystems that are threatened by human activities such as urbanization and irrigation. One such “hotspot” of species endangerment is in Central California’s San Joaquin Valley. One approach to conserving this threatened ecosystem is to focus efforts on a species that is instrumental to the ecosystem. The giant kangaroo rat (Dipodomys ingens) is an ecosystem engineer endemic to the San Joaquin Valley, and its burrowing and grazing behaviors have tremendous effects on the arid grassland habitat. In this thesis I focus on processes that either limit or regulate giant kangaroo rat populations: available food and burrow availability. I build a discrete-time stochastic population model to examine the effects of varying the number of available burrows within an isolated community. Using rainfall as a proxy for food production, I calculate numerical results over the burrow-rainfall parameter space and find distinct equilibria that correspond to scenarios of various combinations of burrow and available food limitation. In particular, my model suggests an optimal burrow-count threshold for a given average rainfall (food availability) value. Below this threshold, each individual increase in the number of burrows increases the steady-state population size. Once the threshold is crossed, not only do new burrows not have much effect on the overall population size, but there appears to be a greater likelihood of an extinction event.
What exactly is a desert? How can I attract hummingbirds? Are cactus spines poisonous? Is a javelina a pig? This book provides detailed answers to 42 questions that the staff at the Desert Museum are most often asked. Supplemented with nearly 100 illustrations, this 200 page book is broken down into three sections: getting to know the desert, the desert as one's backyard and enjoying the desert. Seven useful appendixes cover a range of topics including hummingbird gardening, venomous bites and stings, climate and additional sources of information about desert life. A fun way to learn how wild and fascinating our deserts really are!
The first comprehensive treatment of North American rodents of conservation concern. This action plan summarizes the rodent fauna of North America and provides available information on every rodent taxon that has been considered to be of conservation concern by state, provincial and private conservation agencies and regional experts. It is hoped that the survey provided in this action plan will serve as a common ground for all these parties in drawing up conservation strategies for rodents.
A comprehensive reference on vertebrate species that can cause economic damage or become nuisance pests. Reviews all vertebrate species that come into conflict with human interests in North America. Includes agricultural, commercial, industrial, and residential pest problems and recommends solutions; emphasizes prevention; outlines and explains all currently registered and recommended control methods and materials. Contains dozens of chapters written by various authors. Figures.