Unlike other woodpeckers, there is very little difference between the male and female northern flicker. This article will guide you through the main differences between a male and female northern ...

Those colorful underwings may be flashed during social interactions. A female northern flicker sits in her nest cavity on Douglas in 2010, a rare nesting record for Juneau. (Photo by Bob Armstrong ...

Najin, one of only two female northern white rhinos left in the world, walks in the pen where she is kept for observation. AP Photo/Sunday Alamba When Sudan, the world’s last male northern white ...