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In the late fall, the spermatozoa, located in the seminiferous tubules of the spring peeper, mature and remain there until the spring for breeding. After the seminiferous tubules are emptied, during mating season, the pigmentation of the testis changes from black to a dull grey. [12] In the spring peeper, most of its energy is used during ...
The energy expenditure of chasing and fighting during the breeding season can result in a buck losing an immense amount of weight, with some research documenting losses of as much as 20% of body weight with some sources showing body mass losses of up to 30%. [11] On average, a buck before breeding season can weigh up to 180 pounds (82 kg).
The breeding season is when seasonal breeders reproduce. Various variables can affect when it occurs. [3] A primary influence on the timing of reproduction is food availability. Organisms generally time especially stressing events of reproduction to occur in sync with increases in food availability.
Firefly squid show rare evidence of cephalopod monogamy in their reproductive cycle when they make a yearly migration to the coastal waters of Toyama Bay each spring during their mating season. For example, females store sperm for long periods in bilateral pouches under the neck collar, and are capable of egg spawning after the breeding season ...
The greater sage-grouse is a permanent resident in its breeding grounds but may move short distances to lower elevations during winter. It makes use of a complex lek system in mating and nests on the ground under sagebrush or grass patches. It forages on the ground, mainly eating sagebrush but also other plants and insects.
Martins, not robins, herald spring The first Purple Martin arrivals of the season "are always an exciting event," Siegrist, said in a news release announcing the sightings in Greenville.
Iris coloration depends upon age and season, ranging from bright white to hazel to blue-gray. [13] In the breeding season, both sexes grow a laterally flattened keratinous "horn" on the upper bill, located about one-third the bill's length behind the tip. This is the only one of the eight species of pelican to have a bill "horn".
Deer-crashes have been rising drastically in Massachusetts for the past two years. Here's why that's happening, and how to prevent the accidents.