Many ladybird beetles (a.k.a., ladybugs, or lady beetles) are important predators of insect herbivores in managed and natural ecosystems throughout the world. Thus, they play a tremendous role in protecting crop and non-crop plants from the ravages of herbivores
Tiger cubs don't have a niche. A niche is a role in the ecosystem, and tiger cubs don't fill any role in the ecosystem until they become independent. Adult tigers fill the niche of apex predator.
Ecological Niches are much more specific than 'Mammal'. For instance, Bears fill the top predator niche in lots of alpine forest regions; while mice fill a seed-eating small-creature niche in the same ecosystem.
if it leaves an environmental niche, then another, already existing, species might take that niche; or a new one might evolve to fill it.
Horse flies exist because they evolved from a common insect ancestor with other flies. They fill a certain niche in the ecosystem.
A niche is place that a species fills. Plants fill a niche as herbivores eat them. Bacteria fill a niche as they decompose dead animals and help recycle them.
They fill a space (niche) in a food web.
A mass extinction event creates a large gap in the biodiversity of an ecosystem or multiple ecosystems, which results in a rapid period of evolution of a range of different species that weren't particularly specialised to fill that niche.
some do. You can find a similar placental mammal for every marsupial animal. Example: Kangaroos fill the same niche as North American deer. etc.
It fills fat mexicans.
Herbivores?
Birds have evolved to fill that ecological niche.
Maple trees fill a variety of niches in their ecosystem. They are often important for providing habitat and food for various animals, such as birds and squirrels. Their shade and leaf litter can also influence understory plant growth and soil health.