Sentence examples for occasionally breed from inspiring English sources

Some biologists estimate that as many as 10 percent of animal species and up to 25 percent of plant species may occasionally breed with another species.

However, they have quite a few drawbacks: they are sensitive, do not live in newly set up aquariums, require lots of special attention, and occasionally breed.

The Ruff is an uncommon visitor to Alaska (where it has occasionally bred), Canada and the contiguous states of the US, and has wandered to Iceland, Middle America, northern South America, Madagascar and New Zealand.

The Col2a1-Dlx5t19 allele was maintained in a hemizygous state on a CD-1 background; hemizygous animals were occasionally bred to generate homozygous embryos or neonates.

Occasionally a bred cow will display false heats, but this is no indication that she has come back into heat especially if the only last for a short time then quit.

Males still hatch occasionally, but they breed and live in spruce trees, and American spruces lack nutrients that they need, so they die — a further indication that the adelgids are transplants.

Most rabbits are relatively solitary and sometimes territorial, coming together only to breed or occasionally to forage in small groups.

But it occasionally flocks inland to breed and raise chicks around the waters that accumulate on salt flats after rains that sometimes occur only once every 2 or 3 years.

Stripes do occur occasionally in breeds of domestic horses, but are very rare in Arabians; neither Morton nor Ouseley had even seen manes like these on a horse before.

The researchers say they may be the lucky beneficiaries of something called "hybrid vigor," which occasionally takes hold when two distinct populations breed.

The females of most monogamous species breed with outside males at least occasionally.