| The sea cow, a relative of the manatee, is proof that tasting good can be hazardous to a species' health. |
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| Mechanical sounds constitute the most prominent elements of the species' displays, replacing vocal sounds for territorial advertisement. |
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| This trail, combined with collection of the plants for herbaria and for sale by nurseries, reduced the species' limited numbers. |
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| It's just sad and grim, a horrid reflection on our species' tendency to eschew compromise and go for the greed. |
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| Local extinctions of native species may occur at the invading species' own trophic level or at different trophic levels. |
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| Acclimation may also be hidden if plants are grown under environments which lie at or beyond the limit of that species' acclimation capacity. |
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| Fortunately, fossils of woolly mammoths are abundant in many parts of this species' former range. |
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| However, a more refined understanding of the species' habitat requirements is needed. |
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| However, other patterns in species' distributions failed to provide evidence of competitive exclusion at high productivity. |
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| By the end of the book, readers will have encountered many illustrations of the incredible credulity and cruelty that are among the most tragic of our species' traits. |
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| Decades of harmful land use practices have degraded water quality in much of the species' historic habitat, leaving only a few remnant populations. |
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| This species' use of the Arctic National Wildlife Refuge, as well as major migration staging areas, makes it vulnerable if these areas are lost or degraded. |
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| Since so little was known of the species' ecology or distribution, work concentrated in the central piedmont, especially the Broad River watershed. |
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| The causes for each species' evolutionary transformations and eventual demise are as carefully related as are the details of the lives of its members. |
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| Now specimens grown from seed have been air-freighted to the Royal Botanic Garden in Edinburgh as part of a global effort to ensure the species' long-term survival. |
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| Where one species overlaps in territory with another having a similar call note, the frequency of the first species' song is adjusted upward by about 0.3 kilohertz. |
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| Most species' populations are more or less stable, although three are classified by the IUCN as being at risk. |
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| Population numbers, trends and species' conservation status can be found in the lists of organisms by population. |
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| However, hybridization with or without introgression may, nevertheless, threaten a rare species' existence. |
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| The majority of black bear encounters with wolves occur in the species' northern range, with no interactions being recorded in Mexico. |
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| However, this species has such a long history with humans that it is impossible to tell exactly where the species' original range was. |
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| A species' ability to cope with desiccation determines its upper limit, while competition with other species sets its lower limit. |
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| While captive specimens have lived over 85 years, the species' lifespan in the wild has not been determined. |
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| Recombination is vital to a species' genetic diversity, ensuring that sperm or eggs will have novel combinations of genetic traits. |
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| Ultimately, introgressive hybridization may lead to the occurrence of a hybrid swarm, raising questions as to the species' identity. |
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| Isn't there a time to justify a species' gradual deranking from the top of the priority list in favour of another at the bottom? |
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| Generally this occurs when there has been a drastic change in the environment within the parental species' habitat. |
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| In the species' southern range, the coat remains brown, but is denser and sometimes paler than in summer. |
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| The story also shows how local protection of a species can be successful and important for preserving the species' evolutionary potential. |
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| The aforementioned factor makes interspecific breeding unlikely in areas where the two species' ranges overlap. |
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| From Archangelsk, the border reaches Mezen, thus attaining the species' most northerly range. |
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| Comparing species' relative intelligence is complicated by differences in sensory apparatus, response modes, and nature of cognition. |
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| These British populations mark the northernmost limit of the species' distribution. |
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| Some species' tails are armored, and some, such as those of scorpions, contain venom. |
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| Asian exploitation of turtle nests has been cited as the most significant factor for the species' global population decline. |
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| Each species' cuttlebone has a distinct shape, size, and pattern of ridges or texture. |
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| The species' common name does not derive from any particular green external coloration of the turtle. |
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| Human action presents both intentional and unintentional threats to the species' survival. |
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| Migratory species' reproductive sites often lie in the tropics and their feeding grounds in polar regions. |
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| This species' remarkable speed in digging can easily outstrip a human digger, making the clam difficult to catch. |
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| In addition to monitoring common species' numbers, each year some rare birds are spotted, including a vesper sparrow or a plumbeous vireo. |
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| Density of Hermit Thrush breeding territories is highly variable across the species' range. |
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| The researchers worked with unusual golden fish that have honey-colored stripes instead of the species' typical black stripes. |
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| Here we discuss each species' use of Florida's Atlantic waters and highlight the trends in size class occurrence relative to the 200 m isobath. |
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| The rate of evolutionary change in a species' wing or leg or beak is assessed in degree-of-physical-change units called darwins. |
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| However, deliberate human persecution has reduced the species' range to about one third, because of livestock predation and fear over attacks on humans. |
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| Small and rounded spots cover the entirety of the species' upper body. |
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| Although the red species' northern limit is linked to the availability of food, the Arctic species' southern range is limited by the presence of the former. |
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| Due to the species' status, as of 2014, there is no whale watching location in eastern and mid Atlantic, and oceanic islands feasible to observe right whales regularly. |
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| This species' wingspan is the fifth largest amongst extant eagle species. |
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| After fledging, juvenile birds often disperse further than adults, and to different areas, so are commonly sighted far from a species' normal range. |
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| Contact with a jellyfish tentacle can trigger millions of nematocysts to pierce the skin and inject venom, yet only some species' venom cause an adverse reaction in humans. |
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| The populations in the western Mediterranean Sea are thought to be the oldest, with the species' spread across the north Atlantic thought to postdate the Pleistocene. |
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| In the eastern United States, reestablishing populations of American burying beetles in selected areas of their historic range is essential for the species' recovery. |
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| A facility that releases juvenile fish into the wild for recreational fishing or to supplement a species' natural numbers is generally referred to as a fish hatchery. |
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| The shorter the species' time range, the more precisely different sediments can be correlated, and so rapidly evolving species' fossils are particularly valuable. |
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| This is evident in the two species' vertical migration in the Baltic Sea, where they compete for the limited zooplankton available and necessary for their survival. |
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| Although this species' population now appears to be declining, the decrease is not rapid or large enough to trigger conservation vulnerability criteria. |
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