The matter of the Petrel was a case in point.

By the end of the century, the petrels were thought extinct.

He sprang for the Petrel and reached it, with his men.

Breeding may not occur until the petrels are seven years old.

Petrel continued operations in the Philippines throughout 1898 and 1899.

Several species of storm petrel are threatened by human activities.

Snow petrel partners are faithful for life (around 20 years).

Very little is known about this species of Petrel.

The storm petrels here are different from any others in the world because they fly around during daytime.

"It was easy to mistake her for the Petrel, at that distance.

Although the nostrils on the Petrels are on the top of the bill.

The food demand in the nest of Wilson's storm petrel.

This is in reference to the Petrels habit of appearing to run on the water to take off.

Storm petrels use a variety of techniques to aid flight.

He has a friend there, the passenger you dropped from the Petrel, the other day."

Though the Union men did not know it at the time, the ship they saw was the Petrel.

It includes a number of petrel groups, the relationships between which have finally been resolved to satisfaction.

It is one of the largest petrels that nest in burrows.

Storm petrels have been recorded living as long as 30 years.

A white-bellied petrel wheeled in the sky but said nothing.

They can be aggressive and are capable of chasing off predators like petrels.

Snow petrels fly many miles into the island to find rock on which to lay their eggs.

Albatrosses and petrels are among the most threatened groups of birds in the world.

Petrel was also severely affected by drought periods in 1730, 1740 and 1780.

Providence petrels are curious and have an acute sense of smell.