Once a bird feeds on the snail that is infected, the parasite completes its cycle by moving into the bird's digestive system. It grows and matures in the bird, producing eggs that are excreted ...

I love spring … the colors, the smell, the sounds of singing birds. After a winter of gray skies, white landscapes and no smells — I just love spring. I am fortunate enough to spend a ...

Brood parasitic birds lay their eggs in the nests of others, sparing themselves the expense of rearing their own young. The resulting coevolutionary arms race includes sophisticated defenses by ...