translate English to French: Depending on the time of year and state of the fields, monoculture also appears to invite incursions from opportunistic species, such as Ring-billed Gull and Rock Dove (DesGranges et al.
Selon la pÃ©riode de l'annÃ©e et l'Ã©tat des champs, elle semble aussi favoriser les incursions d'espÃ¨ces opportunistes, comme le goÃ©land Ã bec cerclÃ© et le pigeon biset (DesGranges et collab., 1994).