A project trail camera first: a mama moose with twins! We rarely get videos of moose and even fewer videos of moose with calves! Both calves made it to at least mid-July, which means their odds of surviving are looking alright (see below)! On average, calves in northern Minnesota are born around May 11-12. Recent research on moose calves in Minnesota determined that 34% of calves survive to reach 9 months old. However, 50% of calf mortalities occur by July and most moose calf deaths occur in the