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Without ovulation, she may enter interestrus, which is the combined stages of diestrus and anestrus, before reentering estrus. With the induction of ovulation, the female becomes pregnant or undergoes a non-pregnant luteal phase, also known as pseudopregnancy. Cats are polyestrous but experience a seasonal anestrus in autumn and late winter. [19]
Hyenas have one more pair of ribs than canids do, and their tongues are rough like those of felids and viverrids. [33] Males in most hyena species are larger than females, [ 34 ] though the spotted hyena is an exception, as it is the female of the species that outweighs and dominates the male.
Another factor is due to the shortage of food stocks during winter as the insects are being driven away and as the result, bat hibernate in pregnant condition. [28] In pinnipeds, the purpose of delayed implantation is in order to increase survival chance of the young animals as the mother ensure that the neonates are born at an optimal season. [29]
Spotted hyenas will sometimes follow jackals and wolves during the gazelle fawning season, as jackals and wolves are effective at tracking and catching young animals. Hyenas do not take to eating wolf flesh readily; four hyenas were reported to take half an hour in eating a golden wolf.
The term 'heat dome' has gained prominence recently as climate change, El Niño and other variables have warmed global temperatures and shifted weather patterns. Heat wave or heat dome? Yes, there ...
A notable example of a bird with a pseudo-penis is the red-billed buffalo weaver, which do not use their pseudo-penis for direct insertion during copulation; however it does play a part in successful mating and stimulation. [15] Similarly to the red-billed buffalo weaver, the cassowary, a ratite, exhibits a pseudo-penis in both males and females.
Spotted hyenas have also been found to catch fish, tortoises, humans, black rhino, hippo calves, young African elephants, pangolins and pythons. [7] There is at least one record of four hyenas killing an adult or subadult hippopotamus in Kruger National Park. [8] Spotted hyenas may consume leather articles such as boots and belts around campsites.
The striped hyena hides in caves, niches, pits, dense thickets, reeds, and plume grass during the day to shelter from predators, heat, or winter cold. The size and elaboration of striped hyena dens varies according to location; dens in the Karakum have entrances 0.67–0.72 m wide and are extended over a distance of 4.15–5 m, with no lateral ...