Let’s embark on an adventurous journey through evolution and the effects of climate change on our feathered and spotty friends, while diving deep into the oceans to unravel their mysteries. Buckle up!

• Tawny owls, Strix aluco: Come in shades of pale grey to brown. But what’s interesting is this color is hereditary and follows Mendelian genetics – dark (brown) dominates over pale (grey).
• 30 years in Finland
  • Snow depth trend: Diminishing due to milder winters.
  • Brown feather owls trend: On the rise!
• Possible reason for less snow? Hmm, think of the global warming shenanigans you might've heard of!

Real World Example: Imagine the owls are like those mood rings that change color with temperature. As Finland's winters become less snowy and harsh, the owls seem to prefer flaunting their brown plumage.

Reproductive Fitness: Think of it as the ability of an individual to pass on its genes to the next generation. It's the ultimate evolutionary marathon, and those with good "reproductive fitness" are leading the race.

• Pre-1980: Brown might've been like those limited edition sneakers – rare! But why? The snowy environment made the grey color a camouflage star.
• Post-1980: As snow retreats, the brown birds likely benefit, being less visible against a less snowy backdrop.