As verbs the difference between skelling and skulling
is that skelling is present participle of lang=en while skulling is present participle of lang=en.
As a noun skulling is
the act of determining the age a young bird by measuring the degree of ossification of its skull.
skulling
English
Verb
(head)
Noun
(
en noun)
The act of determining the age a young bird by measuring the degree of ossification of its skull.
References
*http://www.pwrc.usgs.gov/BBL/manual/glossary.htm