New illustrations of Cave Swallow subspecies
Prompted by a couple of recent records of Cave Swallows in the northeastern US, I’ve taken a fresh look at subspecies and done some new illustrations. In April 2021 Cave Swallows have been found in New Jersey and Massachusetts. Both have been identified as the Caribbean subspecies group. Since the 1990s Cave Swallow has been […]
New illustrations of Cave Swallow subspecies Read More »