Small-molecule modulators of Hedgehog signaling: identification and characterization of Smoothened agonists and antagonists
The Hedgehog (Hh) signaling pathway is vital to animal development as it mediates the differentiation of multiple cell types during embryogenesis.

Causes and consequences of song amplitude adjustment in a territorial bird: a case study in nightingales
Recent studies on song variation in Common Nightingales Luscinia megarhynchos have revealed new insights into its importance in the singing behavior of territorial birds.

Vocal sequential exchanges and intragroup spacing in the Northern Muriqui Brachyteles arachnoides hypoxanthus
Sequential exchanges of vocalizations (staccatos and neighs) emitted by Northern Muriquis Brachyteles arachnoides hypoxanthus were recorded at the Biological Station of Caratinga, Minas Gerais State, Brazil.

Songbirds Prefer The Latest Music: Golden Oldies Just Don't Cut It With The Chicks
When it's time to mate, female white-crowned sparrows are looking for a male who sings the latest version of the love song, not some 1979 relic.

Fitness Correlates Of Song Repertoire Size In Free-living Song Sparrows
Birdsong delights listeners and intrigues evolutionary ecologists.

Mule Deer Moms Rescue Other Fawns
Mule deer are giving new meaning to watching out for other mothers' kids.

Mother Deer Cannot Recognize The Calls Of Their Own Offspring But Sheep And Reindeer Can
In a new study from The American Naturalist, researchers from the University of Zurich studied vocal communication between fallow deer mothers and their offspring.

To Elude Bats, A Moth Keeps Its Hearing In Tune
Current understanding of the co-evolution of bats and moths has been thrown into question following new research reported in the journal Current Biology.

Elephants Imitate Sounds As A Form Of Social Communication
Elephants learn to imitate sounds that are not typical of their species.

Warbling Whales Speak A Language All Their Own
Researchers have mathematically confirmed that humpback whales have their own syntax that uses sound units to build phrases that can be combined to form songs that last for hours.