Sentences with phrase «with juvenile birds»

He found that to begin with juvenile birds abandoned cooperative breeding, leaving home earlier and breeding sooner than their counterparts back on Cousin.

Not exact matches

«The fact that we see a full clutch of unhatched turkey eggs, along with other juvenile and adult turkey bones nearby, tells us that these birds were domesticated,» says Feinman.

On other islands with large populations of birds, those birds might help to keep their islands crab - free by eating juvenile coconut crabs, preventing them from colonizing there.

Combining their numbers with climate data, they found that during the El Niño years (1992 - 93 and 1997 - 98), which bring cooler, wetter conditions to the birds» Central American wintering sites, juveniles born that season outnumbered adults 2 or 3 to 1.

Because adult cardinal songs exist as different dialects in different geographic regions, dispersing juvenile birds may land in a population with a foreign dialect.

On average, the birds stayed aloft for 41 days without landing, with one juvenile staying aloft for more than two months.

According to authors Anne L. Balogh, Thomas B. Ryder, and Peter P. Marra (all of whom are affiliated with the Migratory Bird Center), the Opal Daniels and Spring Park sites accounted for 34 of 42 total juvenile mortalities.

Juvenile birds are gray with a black tip on the beak.

We then arrived to an interesting saltwater flat with tons of birds and juvenile fish.

The strange - looking birds still face long odds, of course — odds that naturalists with the Royal Society for the Protection of Birds and other groups hope to improve by tracking three of the remaining Syrian birds and two of the newly introduced Turkish juveniles in an attempt to better understand their migratory route, diet, and the threats they birds still face long odds, of course — odds that naturalists with the Royal Society for the Protection of Birds and other groups hope to improve by tracking three of the remaining Syrian birds and two of the newly introduced Turkish juveniles in an attempt to better understand their migratory route, diet, and the threats they Birds and other groups hope to improve by tracking three of the remaining Syrian birds and two of the newly introduced Turkish juveniles in an attempt to better understand their migratory route, diet, and the threats they birds and two of the newly introduced Turkish juveniles in an attempt to better understand their migratory route, diet, and the threats they face.