Definition of "fussily"

Disembarkation seemed a slow business. From the deck one watched a "Merchant Navy" Pacific drift lazily along the track beside the wall of the Marine Station, and little South Eastern tanks go snorting fussily about.

1946 January and February, 'Talisman', “Bückeburg to Aberayron”, in Railway Magazine, page 41

There's actually not much to see. Tooth-billeds don't build elaborate structures, merely scratching out a space on the rainforest floor that they decorate fussily with soft green leaves.

2005, Sean Dooley, The Big Twitch, Sydney: Allen and Unwin, page 212