[Laurent Rizzotti]

I have 5 French losses over Netherlands for this period

Sources:
(1) Book "Ils étaient là" (Armée de l'Air losses)
(2) Book "Les victoires de l'aviation de chasse française, tome 1. 10-15 Mai 1940", by Arnaud Gillet
(3) Aéro-Journal n° 18

10/5: nil

11/5:
Six heavy fighters Potez 631 of flotilla F1C of Aéronautique Navale (French Fleet Air Arm) attacked He 111 of KG 27s near Walcheren , shooting down two, but were then attacked by Bf 110s and two French fighters were lost. One crew (lieutenant de vaisseau Albert Folliot (pilot) and maitre Frey (air gunner)) baled out, Frey being seriously wounded, while the ptehr crew (maitre Samery (pilot) and quartier-maitre Le Maresquier (gunner)) was lost at sea.
Source (2) (3)

12/5: nil

13/5:
During a morning patrol of Breda area by 9 Morane 406 of GC III/3, the capitaine Roger Trouillard (born 10 May 1909) was shot down in flames by German fighters and killed when his Morane 406 n° 549 crashed at Etten-en-Leur. This was probably in a battle vs I./JG 26.
Source (1) (2)
Potez 63.11 n° 297 of GAO 501 shot down by 9 Bf 109s at Oirschot, near Eindhoven. All 3 crew members (Cne Albert Wiccaert (pilot, born 28 February 1911), Lt Louis Coqueton (observer) and Sgt Louis Leygnac (air gunner)) were killed.
Source (1)

14/5:
Amiot 354 n° 30 of GB I/34 was hit by Flak in Maastricht aera and crash-landed in the country, crew escaped unhurt, so probably the crashplace was in Belgium (as in this Dutch part of this area the crew will probably have been captured by Germans) (this was very probably a night raid, but I don't know if it was during the night of 13-14 or 14-15).
Source (1)

15/5: nil