Hazel:

A great teacher to the young

Fiver:

Has great knowledge of plants

Bigwig:

Strong fighter

Silverweed:

Good with other animals such as birds, moles, etc.

Spartina:

Good at scavenging

Dandelion:

Can see glimpses of the future like Fiver

Hawkbit:

None apart from having a coat that is so dark can scare other rabbits if necessary making them think you are the black rabbit

Campion:

A good digger

BlackBerry:

Strong swimmer

Pipkin:

Good at fighting for a young one