Wisbech Save The Children Quiz Birds

[matimum]

Can anyone help please.
20. Another name for a peeler. (7)
24. Rosemary's fuel perhaps. (6,6) ?????? Petrel?
47. Dabbling duck lives mostly up north. (6)
90. Donald could be a fireman doing this job. (8)
Thank you.

[Buenchico]

24: https://www.rspb.org.uk/birds-and-wildlife/wildlife-guides/bird-a-z/leachs-petrel/

https://en.wikipedia.org/wiki/Rosemary_Leach

[mallyh]

iffy 90 flamingo? flame in go

[Mamyalynne]

47 Scoter

[woodcote1]

90. Shoveller

[Curnow41]

No. 47. Try cockney slang "Syrup of figs" east not off

[bookbinder]

20 skimmer

[Ant1960]

Anyone thinking that Bluecap could be an answer to another name for a Peeler?