MVP
Well-Known Member
Also do the "dinosaur" fossils with wings have beaks?
Yes, see some Pterosaurs.
Is there "dinosaur" fossils with wings but no beak?
yes
Is there "dinosaur" fossils with beaks but no wings?
Yes, Ornithischia was group of beaked herbivorous dinosaurs.
Can you know whether a "dinosaur" fossil had feathers or scales or is it just a speculation since you only have the bones?
there is numerous fossils with feather imprints, so no it is not speculation it is fact. The fossil feathers of one specimen, Shuvuuia deserti, have tested positive for beta-keratin, the main protein in bird feathers, in immunological tests.

List of dinosaur fossils found with feathers.
1.Avimimus portentosus (inferred 1987: quill knobs)
2.Pelecanimimus polydon? (1994)
3.Sinosauropteryx prima (1996)
4.Protarchaeopteryx robusta (1997)
5.GMV 2124 (1997)
6.Caudipteryx zoui (1998)
7.Shuvuuia deserti (1999)
8.Sinornithosaurus millenii (1999)
9.Beipiaosaurus inexpectus (1999)
10.Caudipteryx dongi (2000)
11.Caudipteryx sp. (2000)[
12.Microraptor zhaoianus (2000)
13.Nomingia gobiensis (inferred 2000: pygostyle)
14.Psittacosaurus sp.? (2002)
15.Scansoriopteryx heilmanni (2002)
16.Yixianosaurus longimanus (2003)
17.Dilong paradoxus (2004)
18.Jinfengopteryx elegans (2005)
19.Juravenator starki (2006)
20.Sinocalliopteryx gigas (2007)
21.Velociraptor mongoliensis (inferred 2007: quill knobs)
22.Epidexipteryx *** (2008)
23.Similicaudipteryx yixianensis (inferred 2008: pygostyle; confirmed 2010)
24.Zhongornis haoae (2008)
25.Tianyulong confuciusi? (2009)
26.Concavenator corcovatus? (inferred 2010: quill knobs?)
27.Yutyrannus huali (2012)
28.Microraptor hanqingi (2012)
29.Sciurumimus albersdoerferi (2012)
30.Ornithomimus edmontonicus (2012)
31.Ningyuansaurus wangi (2012)
32.Eosinopteryx brevipenna (2013)
33.Citipati osmolskae (inferred 2013: pygostyle)
34.Conchoraptor gracilis (inferred 2013: pygostyle)
35.Jianchangosaurus yixianensis (2013)