Lockheed Martin designed the F-35 canopy to withstand the impact of of a 4-pound bird at 480 knots on the "reinforced windscreen and 350 knots on the canopy crown" without breaking. In other words: Chicken squadron vs F-35, fight!

Ferocious Chickens Attack F-35 Fighter (and By Ferocious I Really Mean Dead)S

Maybe Apple should use chicken-proof glass for the iPhone 5. [Birdstrike Studies via The DEW Line]